How to judge whether the substance is soluble in acid

RELATED INFORMATIONS

• 1. Does calcination of calcium sulfate dihydrate (CaSO4-2H2O) produce sulfur dioxide (SO2) gas?
• 2. What is the C (OH) ionized by water in a solution of ph=11 at room temperature?
• 3. 1.3X10 negative cubic mol/L PH=2.89 1.3X10 negative third power mol/L PH=2.89
• 4. What is the pH of hydrochloric acid of minus 8 mol/L of 10? How did you figure it out? What is the pH of hydrochloric acid at the negative 8th power of 10 mol/L? How did you figure it out?
• 5. At 25°C, in NH4Cl solution with pH=3: c (OH-) water=1.0×10-11 mol·L-1, what is the wrong choice?
• 6. Size of concentration of hydrogen ions ionized by water in sodium hydroxide with pH of 2, PH of acetic acid, PH of hydrochloric acid, PH of 12, PH of ammonia, PH of 12
• 7. Why is the ionization degree of water in ammonia water with PH=11 less than that in hydrochloric acid water with PH=3? 、
• 8. Chemical formula of slaked lime absorbing sulfur dioxide Who knows?
• 9. 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?
• 10. 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
• 11. Can CaSO4 be removed by acid after soaking in saturated NaCO3 Can you answer in detail == Can CaSO4 be removed by acid after soaking in saturated NaCO3 Can you answer in more detail ==
• 12. About Chemical Equation Precipitation Symbols CaOH2+CO2=CaCO3 precipitation symbol + H20 Why should precipitation symbol be added? CAOH2 is not solid?
• 13. Hydrogen peroxide symbol expression
• 14. Hydrogen peroxide to oxygen, potassium chlorate to oxygen, potassium permanganate to oxygen, which is the most consistent with the green pursuit of chemical experiments?
• 15. The sign expression for oxygen production from potassium permanganate is ______; the sign expression for oxygen production from hydrogen peroxide is ______.
• 16. (NH4)2SO4 solution and NaOH solution ion equation
• 17. When H2O2 is introduced into acidified potassium permanganate solution, potassium permanganate fades. What is the ion equation?
• 18. Is the freezing point of sugar water and brine the same as that of pure water? Why? Design of experimental verification Is the freezing point of sugar water and salt water the same as that of pure water? Why? Design an experiment to verify
• 19. To prepare 500 mL of 0.5 mol copper sulfate solution,62.5 g of gallstone is required. To prepare 500 mL of 0.5 mol copper sulfate solution,62.5 g ofiliary alum is required.
• 20. The bleaching principle of Na2O2(sodium peroxide)? And the bleaching principle of sodium hypochlorite? The bleaching principle of Na2O2? And the bleaching principle of sodium hypochlorite?