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Potassium permanganate is decomposed by heating to form potassium manganate, manganese dioxide and oxygen
2KMnO4== heating == K2MnO2+ MnO2+ O2 Note the gas symbol for oxygen and wish progress
How many grams of potassium permanganate is required to prepare 16 grams of oxygen? How many grams of potassium manganate are produced simultaneously?
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RELATED INFORMATIONS
- 1. When there is potassium permanganate to produce oxygen, the actual generated value is more than the theoretical value. How to verify that the excess oxygen comes from potassium permanganate (residue from experiment)?
- 2. Chemical reaction equation of dilute nitric acid and magnesium hydroxide? It's to be trimmed! Chemical reaction equation of dilute nitric acid and magnesium hydroxide? It's a trim! Chemical reaction equation of dilute nitric acid and magnesium hydroxide? It's to be balanced!
- 3. Reaction of Ferrous Sulfide with Dilute Nitric Acid If iron sulfide reacts with dilute nitric acid, if it is concentrated, redox reaction should occur, but here it is dilute, whether hydrogen sulfide is generated, and what the ion equation should be written as Reaction of ferrous sulfide with dilute nitric acid If iron sulfide reacts with dilute nitric acid, if it is concentrated, redox reaction should occur, but here it is dilute, whether hydrogen sulfide is generated, and what the ion equation should be written as Reaction of ferrous sulfide with dilute nitric acid If iron sulfide reacts with dilute nitric acid, if it is concentrated, redox reaction should occur, but here it is dilute, whether hydrogen sulfide will be generated, and what the ion equation should be written as
- 4. FeS dissolved in dilute nitric acid, equation? The answer is that FeS is oxidized to Fe3+, S, why? Can you write the equation?
- 5. FeS dissolved in dilute nitric acid Dissolution of ferrous sulfide in dilute nitric acid
- 6. Equation for the Reaction of Dilute Nitric Acid with Hydrogen Sulfide Equation for Reaction of Dilute Nitric Acid with Hydrogen Sulfide
- 7. Sequence of reaction between Fe2O3,Fe,FeO and nitric acid
- 8. The addition of 120mL 4mol / L of dilute nitric acid to a mixture of Fe, FeO and Fe2O3 is suitable for mixing... The addition of 120mL 4mol / L of dilute nitric acid to a mixture of Fe, FeO and Fe2O3 results in complete dissolution of the mixture and the production of 1.344 L of NO under standard conditions. The addition of KSCN solution to the resulting solution results in no blood red. If the mixture of the same mass is reduced with sufficient H2 under heating conditions, the production of iron is A,0.24mol B0.21mol C0.16mol D0.14mol The amount of iron
- 9. Mixtures of two or more known substances in FeO,Fe,Fe2O3, Fe3O4 If that atomic numb ratio of iron element to oxygen element is known to be 1:1, A must contain both Fe2O3 and Fe3O4 B contains only Fe and Fe2O3, Fe3O4 C must contain FeO D Unable to determine if FeO is present In a mixture of Na2S,Na2SO3,Na2SO4 three substances If the mass fraction of oxygen element is 22%, what is the mass fraction of sulfur element
- 10. To a certain amount of mixture of Fe, FeO and Fe2O3, add 120mL 4mol L of dilute nitric acid to completely dissolve the mixture, release 1.344L NO (standard condition), add KSCN solution to the resulting solution, and no red color appears. If the mixture of the same mass is reduced by heating with sufficient hydrogen, the amount of iron can be () A. 0.24 mol B. 0.21 mol C. 0.16 mol D. 0.14 mol
- 11. (2/2), The solution PH=?
- 12. At room temperature, in a solution of pH=12, the c [OH-] ionized by water is () A.1.0×10-7mol•L-1 B.1.0×10-6mol•L-1 C.1.0×10-6mol•L-1 D.1.0×10-12mol•L-1 At room temperature, in a solution of pH=12, the c [OH-] ionized by water is () A.1.0×10-7mol•L-1 B.1.0×10-6mol•L-1 C.1.0×10-6mol•L-1 D.1.0×10-12 mol•L-1
- 13. C (OH+)=() in KOH solution with pH=12.0, c (OH+)=() in KCN solution with pH=12.0;
- 14. Ammonia water ionized sodium hydroxide In 0.1 mol/L ammonia solution, there is an ionization equilibrium of NH3H2O==NH4++OH-. 1. Adding sodium hydroxide, how the chemical equilibrium will move, how the concentration of ammonia and hydroxide will change, and how the number of ammonia ions will change If hydrochloric acid is added, how the chemical equilibrium will move, how the concentration of ammonia and hydroxide will change, and how the number of ammonia ions will change 3 If water is added, how the chemical equilibrium will move, how the concentration of ammonia and hydroxide will change, and how the number of ammonia ions will change
- 15. In a solution of pH=12, must the C (OH & amp;# x2212;) ionized by water be equal to 10 minus 2 mol/l Yes or No Please give examples
- 16. What is the concentration of oh- ionized by water in a KCN solution with Ph=10
- 17. At 25°, the concentration of OH- ionized from water is the same as that of NaOH and ammonia at PH=8? Isn't it said that weak acid and weak base promote strong inhibition of water ionization
- 18. Na2s solution, PH=10. I know because negative divalent sulfur ions + water =(reversible) HS (negative monovalent)+ OH-. Then, because the hydrolysis produces hydroxide, the concentration of H should be used to calculate the OH and H of the water ionization. That is, the answer should be the negative tenth power of 10. But the answer is the negative fourth power of 10! Why? Na2s solution, PH=10. I know because negative divalent sulfur ions + water =(reversible) HS (negative monovalent)+ OH-. Then, because the hydrolysis produces hydroxyl radicals, the concentration of H should be used to calculate the OH and H of the water ionization. That is, the answer should be a tenth power of 10. But the answer is the negative fourth power of 10! Why? Na2s solution, PH=10. I know because negative divalent sulfur ions + water =(reversible) HS (negative monovalent)+ OH-. Then, because the hydrolysis produces hydroxyl radicals, the concentration of H should be used to calculate the OH and H of the water ionization. That is, the answer should be power of 10. But the answer is the negative fourth power of 10! Why?
- 19. C (OH & amp;# x2212;) ionized from water in both NaOH and Na2O2 solutions with a pH of 12, the former being less than the latter Why?
- 20. Pure water at 100.d egree. C. Kw=10*-12, NAOH and NACN solutions each having a pH of 11 at this temperature, the ratio of C (OH-) with water is