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18. You have 75.0 mL of 0.10 M HA. After adding 30.0 mL of 0.10 M NaOH, the pH of the HA-NaOH solution is 5.50. What is the Ka value of HA?
(A)1.74 × 10-8
(B)2.1 × 10-6
(C)6.0 × 10-5
(D) 5.6 × 10-4
(E)6.6 × 10-7

答案：登入後觀看
難度： 適中
最佳解!
bd4588 高三下 (2017/07/06)
[HA]  = 0.045x0.10/0.105 ☆ (0.04286 ...


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18. You have 75.0 mL of 0.10 M HA. After..-阿摩線上測驗