Ionic EquilibriumHard
Question
100 ml of 0.5M hydrazoic acid (HN3, Ka = 3.6 × 10-4) and 400ml of 0.1M cyanic acid (HOCN, Ka = 8 × 10-4) are mixed. which of the following is (are) true for the final solution?
Options
A.[H+] = 10-2 M
B.[N3-] = 3.6 × 10-3 M
C.[OCN-] = 6.4 × 10-3 M
D.[H+] = 1.4 × 10-2 M
Solution
Total [H+] = 
∴ [H+] = 10-2 M.
For HN3, [N3-] =
× 100 = 3.6 × 10-3 M.
For HOCN, [OCN-] =
= 6.4 × 10-3 M.
∴ [H+] = 10-2 M.
For HN3, [N3-] =
× 100 = 3.6 × 10-3 M.For HOCN, [OCN-] =
= 6.4 × 10-3 M.Create a free account to view solution
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