What is the concentration of oh- ionized by water in a KCN solution with Ph=10

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• 1. 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
• 2. 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
• 3. C (OH+)=() in KOH solution with pH=12.0, c (OH+)=() in KCN solution with pH=12.0;
• 4. 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
• 5. (2/2), The solution PH=?
• 6. Potassium permanganate is decomposed by heating to form potassium manganate, manganese dioxide and oxygen
• 7. 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)?
• 8. 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!
• 9. 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
• 10. FeS dissolved in dilute nitric acid, equation? The answer is that FeS is oxidized to Fe3+, S, why? Can you write the equation?
• 11. 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
• 12. 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?
• 13. 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?
• 14. 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
• 15. If 100mL0.1mol / L hydrochloric acid solution is mixed with 200mL 0.05mol / L sulfuric acid solution (the volume change is ignored), then what is the concentration of ion in the solution! ? To process!
• 16. Chemical and ionic reaction equations of ferric chloride and potassium iodide
• 17. The following experimental phenomena are described or explained consistently A: sulfur burns in oxygen to produce sulfur dioxide gas B; The charcoal burns in oxygen, giving off a white flame and producing a large amount of white smoke C; The phenomenon that can be seen in experiments with electrolytic water is that the positive electrode produces oxygen and the negative electrode produces hydrogen Air is a mixture because it is made up of nitrogen, oxygen, carbon dioxide and many other substances (Chemistry) the following experimental phenomena are described or interpreted consistently A: sulfur burns in oxygen to produce sulfur dioxide gas B; The charcoal burns in oxygen, giving off a white flame and producing a large amount of white smoke C. The phenomenon that can be seen in experiments with electrolytic water is that the positive electrode produces oxygen and the negative electrode produces hydrogen Air is a mixture because it is made up of nitrogen, oxygen, carbon dioxide and many other substances
• 18. A g A mixture of Fe, FeO and Fe2O3 is dissolved in exactly 240mL 1mol L of dilute nitric acid to form Fe (NO3)2, H2O and 0.03molNO, The following is the correct judgment for the ag mixture A. The mass of the iron element was 2.52 g B.Fe2O3, and the mass was 8.40 g C. The amount of iron is 0.105mol D. the ratio of iron to oxygen is 7:4 I figured it out Fe0.045mol FeO0.06mol Fe2O3 0 Mol I chose ACD. But why is CD the only answer?
• 19. Chemical formula of slaked lime absorbing sulfur dioxide Who knows?
• 20. Why is the ionization degree of water in ammonia water with PH=11 less than that in hydrochloric acid water with PH=3? 、