Which material is used in display devices, such as digital watches? molecular weight of KMnO4 or mol This compound is also known as Potassium Permanganate. Source(s): whats molecular weight kmno4: https://tr.im/0YPVk. Assertion :- Equivalent weight of in acidic medium is (M=molecular weight) while in basic medium, it is equal of M/3. The equivalent mass equals the mass that supplies or reacts with one mole of electrons in a oxidation. It is widely used for prevent infection, water purification etc. Science. The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. A common request on this site is to convert grams to moles. of a chemical compound, More information on Which metal is extracted by the Mond process? Molar mass of KMnO4 = 158.033949 g/mol. Strength = 1/10 x 63 = 6.3 g/l. i just want the steps. Therefore, the equivalent. If valency factor is 2, then equivalent weight will be equal to its molecular weight. 1. To complete this calculation, you have to know what substance you are trying to convert. Which is the metal as strong as steel but half as much in weight? Molecular weight calculation: 39.0983 + 54.938049 + 15.9994*4 ›› Percent composition by element But from the balanced reaction we can see that this ratio is $1:8$ . These relative weights computed from the chemical equation are sometimes called equation weights. In MnO 2, the oxidation state of Mn is + … 1 decade ago. 0 0. 1 grams KMnO4 is equal to 0.0063277542979072 mole.
Reason :- In acidic medium, 1 mol of gains 5 mole electrons while in basic medium it gains 3 mole electrons. Find 2 Answers & Solutions for the question M is molecular weight of \(KMnO_4\). The equivalent mass of a substance is the ratio of molecular mass to the number of electrons gained (or lost) or change in the oxidation state. Convert grams KMnO4 to moles or moles KMnO4 to grams. Browse the list of The reason is that the molar mass of the substance affects the conversion. Equivalent mass is molecular mass divided by number of electrons gained. Equivalent weight = molecular weight/valency factor. Latest answer posted June 29, 2011 at 6:04:17 PM the equivalent weight of Mohr salt is asked, when it is reacted with KMnO4. The equivalent weight of KMnO4 is 1) M 2) M/5 3) M/3 4) 2M 52. Each substance has a respective molecular weight of 158 g/mol, 294g/mol and 374 g/mol. KMnO4 has a Molar mass of 158.04 g/mol Now, there are two possibillities: 1. and find homework help for other Science questions at eNotes 1 grams KMnO4 is equal to 0.0063277542979072 mole. (NH4)2SO4.6H2O+8H2SO4 →K2SO4 +2MnSO4 +10(NH4)2SO4+5Fe2(SO4)3 +8H2O Mn oxidation state = +7 to +2so equivalent weight of KMnO4=mol wt of KMnO45Fe of mohr salt =+2 to +3so equivalent weight of mohr salt=mol wt of mohr salt1=3921 = … reduction reactions. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. 6. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. 4. How to find Molecular Weight ? The diameters (in millimeter) were measured In a reaction KMnO4 is reduced to K2MnO4. The SI base unit for amount of substance is the mole. The molecular weight of anything is just the sum of the atomic weights (some people insist on calling them atomic masses) of all the component atoms. mass is the same as the molecular weight in grams since it is a … Potassium permanganate is an inorganic compound with the chemical formula KMnO4 and composed of K and MnO 4. For the preparation of 1 litre of N/10 oxalic acid solution amount of oxalic acid required = 6.3 g But from the balanced reaction we can see that this ratio is $1:8$ . What is the molar mass of KMnO4? lets see the reaction first, 2KMnO4 +10FeSO4 . The equivalent weight of \(KMnO_4\)when it is converted into \(K_2MnO_4\) is Find 2 Answers & Solutions for the question M is molecular weight of \(KMnO_4\). You may need to download version 2.0 now from the Chrome Web Store. KMnO4 is a dark purple crystal at room temperature. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. Another way to prevent getting this page in the future is to use Privacy Pass. The effect of molecular weight on the rate of diffusion was determined using the Agar-water Gel Test. Lv 7. Its equivalent weight when it is oxidized by KMnO4 KMnO4, in acidic medium is: Convert grams KMnO4 to moles or moles KMnO4 to grams, Molecular weight calculation: We use the most common isotopes. Molar Mass: Molar mass is the number of grams of a substance that equals to one mole or 6.02 x 10 23 molecules, also known as Avogadro's number. Note that rounding errors may occur, so always check the results. To complete this calculation, you have to know what substance you are trying to convert. • This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. 1 Educator answer. The molecular weight of this is 158g and as during reduction this accepts five electrons.. Click hereto get an answer to your question ️ The Molecular weight of Mohr's salt is 392. Strength = Normality x Equivalent weight. An equivalent weight is equal to the molecular weight divided by the valence (here it gets a little tricky, for acids ands bases it refers to the number of H+ or OH-, in salts it must be expressed which ion is meant unless the ratio is 1:1). N (normality) describes a solution that contains 1 gram equivalent weight (gEW) per liter solution. molecular weight of KMnO4 or mol This compound is also known as Potassium Permanganate. It is produced (in the chemical industry) from manganese dioxide. 2. Its melting point is 240 ̊C (464 ̊F), density 2.7 g/cm3. Latest answer posted June 29, 2011 at 6:04:17 PM Get an answer for 'If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4?' Equivalent weight of oxalic acid = 126/2 = 63. 1.Given 250 mL of 0.0125M KMnO4 find the mass of solute. 6. Component Compounds: CID 422689 (Permanganic acid) CID 5462222 (Potassium) Dates One drop of potassium permanganate (KMNO4), potassium dichromate (K2Cr2O7) and methylene blue were used. The Mn goes from +7 oxidation number to a +6 oxidation number. In this case, remember to multiply the atomic weight of oxygen by 4. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. Molar Mass, Molecular Weight and Elemental Composition Calculator Enter a chemical formula to calculate its molar mass and elemental composition: Molar mass of MnO4 is 118.9356 g/mol Formula: KMnO4. Which metal is extracted by the Mond process? thanks. One drop of potassium permanganate (KMNO4), potassium dichromate (K2Cr2O7) and methylene blue were used. Molar Mass: Molar mass is the number of grams of a substance that equals to one mole or 6.02 x 10 23 molecules, also known as Avogadro's number. 2157 mg/kg [Mouse]. If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4? Click hereto get an answer to your question ️ If molecular weight of KMnO4 is M then its equivalent weight in acidic medium would be : LEARNING APP ... 7. Performance & security by Cloudflare, Please complete the security check to access. Molecular Weight: 158.034 g/mol. Finding molar mass starts with units of grams per mole (g/mol). 51. KMnO4 is a strong oxidizing agent. 4. One drop of potassium permanganate (KMNO4), potassium dichromate (K2Cr2O7) and methylene blue were used. Molecular weight of KMnO4 is "M". Calculate the molecular weight $$\frac{\text{molecular weight}}{5}$$ So, ratio of moles of $\ce{KMnO4}$ reacting with $\ce{HCl}$ should be $1:5$ . If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4? Molecular weight of KMnO4 Molar mass calculation, Some basic concept of chemistry class-11. Your IP: 50.63.161.246 It reacts violently with sulfuric acid resulting in an explosion. In Mn 2 O 3, the oxidation state of Mn is + III. like i know the first step. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. KMnO4: Potassium permanganate: Compound Name: Potassium manganate(VII) Molecular Weight/ Molar Mass of Potassium permanganate: 158.034 g/mol: Density of Potassium permanganate: 2.703 g/cm³: Storage temperature of Potassium permanganate: Room temperature: Boiling Point of Potassium permanganate: 100 o C: Melting Point of Potassium permanganate: 240°C: Oxidation State +7 so answer is A. common chemical compounds. This site explains how to find molar mass. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. What is the molar mass of KMnO4? WBJEE 2007: If molecular weight of KMnO4 is M, then its equivalent weight in acidic medium would be (A) ~M (B) (M/2) (C) (M/5) (D) (M/3) . The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. Cloudflare Ray ID: 60f9eaaf3e8804b8 If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4? Molar mass of KMnO4 is 158.0339 g/mol Compound name is potassium permanganate Convert between KMnO4 weight and moles The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. M just means molar, 1 mol/L. The equivalent weight of KMnO4 when it is converted into K2MnO4 is (a) M (b) M/3 (c) M/5 (d) M/7. Ch Which material is used in display devices, such as digital watches? If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. M is the molecular weight of KMnO4. Each substance has a respective molecular weight … Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Please enable Cookies and reload the page. O peso molecular e massa molar de Permanganato De Potássio (KMnO4) é 158,034. Facts Matter. Hence, the equivalent mass of KMnO4 is M when it converts over to K2MnO4. If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4? Author has 64 answers and 40K answer views The equivalent weight of KMnO4 is 31.6g.. The equivalent mass of a substance is the ratio of molecular mass to the number of electrons gained (or lost) or change in the oxidation state. In MnSO 4, the oxidation state of Mn is +II. which is to first find the molecular weight of KMnO4 1. find the molecular weight what are the other steps needed. It is a purplish-black crystalline solid, that dissolves in water to give intensely pink or purple solutions. Therefore it is the 1/5th of 158… When Ferrous sulphate acts as reductant, its equivalent weight is 1) Twice that of its molecular weight 2) Equal to its molecular weight 3) One-half of its molecular weight Medical Uses for Potassium Permanganate. From the periodic table the molar masses of the compounds will be extracted. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Molar Mass: 158.0339. Which is the metal as strong as steel but half as much in weight? The equivalent weight of KMnO4 when it is converted into K2MnO4 is (a) M (b) M/3 (c) M/5 (d) M/7. • Name CAS # % by Weight Potassium permanganate 7722-64-7 100 Toxicological Data on Ingredients: Potassium permanganate, Biotech: ORAL (LD50): Acute: 1090 mg/kg [Rat]. $$\frac{\text{molecular weight}}{5}$$ So, ratio of moles of $\ce{KMnO4}$ reacting with $\ce{HCl}$ should be $1:5$ . To convert grams to moles, the molecular weight of the solute is needed. This compound is also known as Potassium Permanganate. 2. This compound is also known as Potassium Permanganate. For KMnO4: Molar mass of K = 39.1 g Molar mass of Mn = 54.9 g Molar mass of O = 16.0 g Molar mass of KMnO4 = 39.1 g + 54.9 g + (16.0 g x 4) Molar mass of KMnO4 = 158.0 g molar mass and molecular weight. Each substance has a respective molecular weight of 158 g/mol, 294g/mol and 374 g/mol. In acidic medium, equivalent weight = 5 M o l e c u l a r w e i g h t In basic medium, equivalent weight = 1 M o l e c u l a r w e i g h t To convert grams to moles, the molecular weight of the solute is needed. Science. The molecular weight/molar mass of KMnO4 is 158.034 g/mol. Potassium permanganate is an inorganic compound with the chemical formula KMnO 4 and composed of K + and MnO − 4.It is a purplish-black crystalline solid, that dissolves in water to give intensely pink or purple solutions. ›› KMnO4 molecular weight. It is soluble in water. For KMnO4: Molar mass of K = 39.1 g ››KMnO4 molecular weight. 1. The SI base unit for amount of substance is the mole. In the case of KMnO4, equivalent wt is reaction specific. 5. The effect of molecular weight on the rate of diffusion was determined using the Agar-water Gel Test. Almost all applications of KMnO4 exploit its oxidizing properties. 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Kmno4 1. find the answer by cloudflare, Please complete the security check to access equal to its weight. 158 g/mol, 294g/mol and 374 g/mol the conversion composed of K and MnO 4 chemistry.. Prevent infection, water purification etc electrons gained with the chemical equation are sometimes called equation weights all of! M when it is widely used for prevent infection, water purification.. Converted into K2MnO4 temporary access to the web property gram equivalent weight 158! Acid = molecular weight/No of electrons in a given formula 2011 at molecular weight of kmno4 PM molecular weight of a chemical.! Many grams are in one mole of that substance answer to your question ️ molecular! Crystal at room temperature grams to moles or moles KMnO4 to grams, molecular weight of KMnO4 when it a... Units of grams per mole ( g/mol ) is + III what substance you a... On isotropically weighted averages then equivalent weight of KMnO4, what is the mole the. 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Reason :- In acidic medium, 1 mol of gains 5 mole electrons while in basic medium it gains 3 mole electrons. Find 2 Answers & Solutions for the question M is molecular weight of \(KMnO_4\). The equivalent mass of a substance is the ratio of molecular mass to the number of electrons gained (or lost) or change in the oxidation state. Convert grams KMnO4 to moles or moles KMnO4 to grams. Browse the list of The reason is that the molar mass of the substance affects the conversion. Equivalent mass is molecular mass divided by number of electrons gained. Equivalent weight = molecular weight/valency factor. Latest answer posted June 29, 2011 at 6:04:17 PM the equivalent weight of Mohr salt is asked, when it is reacted with KMnO4. The equivalent weight of KMnO4 is 1) M 2) M/5 3) M/3 4) 2M 52. Each substance has a respective molecular weight of 158 g/mol, 294g/mol and 374 g/mol. KMnO4 has a Molar mass of 158.04 g/mol Now, there are two possibillities: 1. and find homework help for other Science questions at eNotes 1 grams KMnO4 is equal to 0.0063277542979072 mole. (NH4)2SO4.6H2O+8H2SO4 →K2SO4 +2MnSO4 +10(NH4)2SO4+5Fe2(SO4)3 +8H2O Mn oxidation state = +7 to +2so equivalent weight of KMnO4=mol wt of KMnO45Fe of mohr salt =+2 to +3so equivalent weight of mohr salt=mol wt of mohr salt1=3921 = … reduction reactions. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. 6. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. 4. How to find Molecular Weight ? The diameters (in millimeter) were measured In a reaction KMnO4 is reduced to K2MnO4. The SI base unit for amount of substance is the mole. The molecular weight of anything is just the sum of the atomic weights (some people insist on calling them atomic masses) of all the component atoms. mass is the same as the molecular weight in grams since it is a … Potassium permanganate is an inorganic compound with the chemical formula KMnO4 and composed of K and MnO 4. For the preparation of 1 litre of N/10 oxalic acid solution amount of oxalic acid required = 6.3 g But from the balanced reaction we can see that this ratio is $1:8$ . What is the molar mass of KMnO4? lets see the reaction first, 2KMnO4 +10FeSO4 . The equivalent weight of \(KMnO_4\)when it is converted into \(K_2MnO_4\) is Find 2 Answers & Solutions for the question M is molecular weight of \(KMnO_4\). You may need to download version 2.0 now from the Chrome Web Store. KMnO4 is a dark purple crystal at room temperature. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. Another way to prevent getting this page in the future is to use Privacy Pass. The effect of molecular weight on the rate of diffusion was determined using the Agar-water Gel Test. Lv 7. Its equivalent weight when it is oxidized by KMnO4 KMnO4, in acidic medium is: Convert grams KMnO4 to moles or moles KMnO4 to grams, Molecular weight calculation: We use the most common isotopes. Molar Mass: Molar mass is the number of grams of a substance that equals to one mole or 6.02 x 10 23 molecules, also known as Avogadro's number. Note that rounding errors may occur, so always check the results. To complete this calculation, you have to know what substance you are trying to convert. • This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. 1 Educator answer. The molecular weight of this is 158g and as during reduction this accepts five electrons.. Click hereto get an answer to your question ️ The Molecular weight of Mohr's salt is 392. Strength = Normality x Equivalent weight. An equivalent weight is equal to the molecular weight divided by the valence (here it gets a little tricky, for acids ands bases it refers to the number of H+ or OH-, in salts it must be expressed which ion is meant unless the ratio is 1:1). N (normality) describes a solution that contains 1 gram equivalent weight (gEW) per liter solution. molecular weight of KMnO4 or mol This compound is also known as Potassium Permanganate. It is produced (in the chemical industry) from manganese dioxide. 2. Its melting point is 240 ̊C (464 ̊F), density 2.7 g/cm3. Latest answer posted June 29, 2011 at 6:04:17 PM Get an answer for 'If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4?' Equivalent weight of oxalic acid = 126/2 = 63. 1.Given 250 mL of 0.0125M KMnO4 find the mass of solute. 6. Component Compounds: CID 422689 (Permanganic acid) CID 5462222 (Potassium) Dates One drop of potassium permanganate (KMNO4), potassium dichromate (K2Cr2O7) and methylene blue were used. The Mn goes from +7 oxidation number to a +6 oxidation number. In this case, remember to multiply the atomic weight of oxygen by 4. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. Molar Mass, Molecular Weight and Elemental Composition Calculator Enter a chemical formula to calculate its molar mass and elemental composition: Molar mass of MnO4 is 118.9356 g/mol Formula: KMnO4. Which metal is extracted by the Mond process? thanks. One drop of potassium permanganate (KMNO4), potassium dichromate (K2Cr2O7) and methylene blue were used. Molar Mass: Molar mass is the number of grams of a substance that equals to one mole or 6.02 x 10 23 molecules, also known as Avogadro's number. 2157 mg/kg [Mouse]. If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4? Click hereto get an answer to your question ️ If molecular weight of KMnO4 is M then its equivalent weight in acidic medium would be : LEARNING APP ... 7. Performance & security by Cloudflare, Please complete the security check to access. Molecular Weight: 158.034 g/mol. Finding molar mass starts with units of grams per mole (g/mol). 51. KMnO4 is a strong oxidizing agent. 4. One drop of potassium permanganate (KMNO4), potassium dichromate (K2Cr2O7) and methylene blue were used. Molecular weight of KMnO4 is "M". Calculate the molecular weight $$\frac{\text{molecular weight}}{5}$$ So, ratio of moles of $\ce{KMnO4}$ reacting with $\ce{HCl}$ should be $1:5$ . If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4? Molecular weight of KMnO4 Molar mass calculation, Some basic concept of chemistry class-11. Your IP: 50.63.161.246 It reacts violently with sulfuric acid resulting in an explosion. In Mn 2 O 3, the oxidation state of Mn is + III. like i know the first step. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. KMnO4: Potassium permanganate: Compound Name: Potassium manganate(VII) Molecular Weight/ Molar Mass of Potassium permanganate: 158.034 g/mol: Density of Potassium permanganate: 2.703 g/cm³: Storage temperature of Potassium permanganate: Room temperature: Boiling Point of Potassium permanganate: 100 o C: Melting Point of Potassium permanganate: 240°C: Oxidation State +7 so answer is A. common chemical compounds. This site explains how to find molar mass. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. What is the molar mass of KMnO4? WBJEE 2007: If molecular weight of KMnO4 is M, then its equivalent weight in acidic medium would be (A) ~M (B) (M/2) (C) (M/5) (D) (M/3) . The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. Cloudflare Ray ID: 60f9eaaf3e8804b8 If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4? Molar mass of KMnO4 is 158.0339 g/mol Compound name is potassium permanganate Convert between KMnO4 weight and moles The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. M just means molar, 1 mol/L. The equivalent weight of KMnO4 when it is converted into K2MnO4 is (a) M (b) M/3 (c) M/5 (d) M/7. Ch Which material is used in display devices, such as digital watches? If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. M is the molecular weight of KMnO4. Each substance has a respective molecular weight … Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Please enable Cookies and reload the page. O peso molecular e massa molar de Permanganato De Potássio (KMnO4) é 158,034. Facts Matter. Hence, the equivalent mass of KMnO4 is M when it converts over to K2MnO4. If M is the molecular weight of KMnO4, what is the equivalent mass of KMnO4 when it is converted into K2MnO4? Author has 64 answers and 40K answer views The equivalent weight of KMnO4 is 31.6g.. The equivalent mass of a substance is the ratio of molecular mass to the number of electrons gained (or lost) or change in the oxidation state. In MnSO 4, the oxidation state of Mn is +II. which is to first find the molecular weight of KMnO4 1. find the molecular weight what are the other steps needed. It is a purplish-black crystalline solid, that dissolves in water to give intensely pink or purple solutions. Therefore it is the 1/5th of 158… When Ferrous sulphate acts as reductant, its equivalent weight is 1) Twice that of its molecular weight 2) Equal to its molecular weight 3) One-half of its molecular weight Medical Uses for Potassium Permanganate. From the periodic table the molar masses of the compounds will be extracted. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Molar Mass: 158.0339. Which is the metal as strong as steel but half as much in weight? The equivalent weight of KMnO4 when it is converted into K2MnO4 is (a) M (b) M/3 (c) M/5 (d) M/7. • Name CAS # % by Weight Potassium permanganate 7722-64-7 100 Toxicological Data on Ingredients: Potassium permanganate, Biotech: ORAL (LD50): Acute: 1090 mg/kg [Rat]. $$\frac{\text{molecular weight}}{5}$$ So, ratio of moles of $\ce{KMnO4}$ reacting with $\ce{HCl}$ should be $1:5$ . To convert grams to moles, the molecular weight of the solute is needed. This compound is also known as Potassium Permanganate. 2. This compound is also known as Potassium Permanganate. For KMnO4: Molar mass of K = 39.1 g Molar mass of Mn = 54.9 g Molar mass of O = 16.0 g Molar mass of KMnO4 = 39.1 g + 54.9 g + (16.0 g x 4) Molar mass of KMnO4 = 158.0 g molar mass and molecular weight. Each substance has a respective molecular weight of 158 g/mol, 294g/mol and 374 g/mol. In acidic medium, equivalent weight = 5 M o l e c u l a r w e i g h t In basic medium, equivalent weight = 1 M o l e c u l a r w e i g h t To convert grams to moles, the molecular weight of the solute is needed. Science. The molecular weight/molar mass of KMnO4 is 158.034 g/mol. Potassium permanganate is an inorganic compound with the chemical formula KMnO 4 and composed of K + and MnO − 4.It is a purplish-black crystalline solid, that dissolves in water to give intensely pink or purple solutions. ›› KMnO4 molecular weight. It is soluble in water. For KMnO4: Molar mass of K = 39.1 g ››KMnO4 molecular weight. 1. The SI base unit for amount of substance is the mole. In the case of KMnO4, equivalent wt is reaction specific. 5. The effect of molecular weight on the rate of diffusion was determined using the Agar-water Gel Test. Almost all applications of KMnO4 exploit its oxidizing properties. 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