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8. In a mixture of weak acid and its salt, the ratio of the concentration of acid to salt is increased ten fold. The pH of the solution A. decreases by one B. decreases by one tenth C. increases by one D. increases ten fold

8. In a mixture of weak acid and its salt, the ratio of the concentration of acid to salt is increased ten fold. The pH of the solution A. decreases by one B. decreases by one tenth C. increases by one D. increases ten fold

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8. In a mixture of weak acid and its salt, the ratio of the concentration of acid to salt is increased ten fold. The pH of the solution A. decreases by one B. decreases by one tenth C. increases by one D. increases ten fold 9. In a solution, when the concentrations of a weak acid and its conjugate base are equal, A. the system is not at equilibrium. B. the buffering capacity is significantly decreased. C. the -log of the [H*] and the -log of the K, are equal. D. all of the above are true. 10. Consider a solution which is 0.10 M in CH3COOH and 0.20 M in NaCH;COO. Which of the following statements is TRUE? A. If a small amount of NaOH is added, the pH decreases very slightly. B. If NaOH is added, the OH" ions react with the CH3CO0' ions. C. If a small amount of HCl is added, the pH decreases very slightly. D. If HCl is added, the H* ions react with CH3COOH ions.
Transcribed Image Text:8. In a mixture of weak acid and its salt, the ratio of the concentration of acid to salt is increased ten fold. The pH of the solution A. decreases by one B. decreases by one tenth C. increases by one D. increases ten fold 9. In a solution, when the concentrations of a weak acid and its conjugate base are equal, A. the system is not at equilibrium. B. the buffering capacity is significantly decreased. C. the -log of the [H*] and the -log of the K, are equal. D. all of the above are true. 10. Consider a solution which is 0.10 M in CH3COOH and 0.20 M in NaCH;COO. Which of the following statements is TRUE? A. If a small amount of NaOH is added, the pH decreases very slightly. B. If NaOH is added, the OH" ions react with the CH3CO0' ions. C. If a small amount of HCl is added, the pH decreases very slightly. D. If HCl is added, the H* ions react with CH3COOH ions.
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