10. What is the pH of a solution in which theH\'] -4.15 x10 M? A. 6.50 C. 8.04 D

Question

10. What is the pH of a solution in which theH'] -4.15 x10 M? A. 6.50 C. 8.04 D.7.50 B. 7.38 [OH) . 4.47x 105 M? 11. what is the pOH of a solution in which A. 9.93 B. 5.53 C. 4.35 D. 4.07 12. What is the pOH of a solution that is 2.1 x 10 M in Na(OH)? A. 12.32 B. 1.38 C. 1.68 D. 12.62 13. The Ka of weak acid is 4.8 x 10. What is the pH of a 0.58 M solution of this acid?6 A. 0.24 C. 13.76 D. 2.28 B. 11.72 14, what is the Kb of the formate ion, HCOO. Ka of HCOOH-1.8x 104 ? A. 5.6 x 101 C. 7.5 x 106 D. 1.8 x 1010 B. 1.8 x 108

Explanation / Answer

Ans 10 : B) 7.38

pH is the negative logarithm of hydrogen ion concentration in the solution.

pH = -log [H+]

pH = -log (4.15 x 10-8)

pH = 7.38

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