Which of the following solutions would have the highest pH? Assume that they are

Question

Which of the following solutions would have the highest pH? Assume that they are all 0.10 M in acid at 25 degree C. The acid is followed by its K_a value. A. HF, 3.5 times 10^-4 B. HCN, 4.9 times 10^-10 C. HNO_2, 4.6 times 10^-4 D. HCHO_2, 1.8 times 10^-4 E. HCIO_2, 1.1 times 10^-2 Calculate the pH of a buffer that is 0.225 M acetic acid and 0.162 M potassium acetate. Calculate the pH of a solution formed by mixing 250.0 mL of 0.15 M NH_4CI with 100.0 mL of 0.20 M NH_3. A 1.00 L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 100.0 mL of 1.00 M HCI.

Explanation / Answer

Q40.

highest pH --> leat acidic

from the list

clearly HCN is the least acidic, since Ka value is the lowest

choose HCN

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