Calculate the pH of a solution that contains 7.8 x 10^-6 M OH^- at 25 degree C.

Question

Calculate the pH of a solution that contains 7.8 x 10^-6 M OH^- at 25 degree C. What is the pH of a solution whose pOH is 4.3 Determine the pH of a 0.265 M HCIO solution. The K_a of HCIO is 2.9 x 10 ^-8. 0.273 M solution of unknown Acid X in water has a pH of 1.25. What is the K_a of Acid X A student completely dissolves 31.5 mg of nitric acid (HNO_3) in water to result in a total of 22 m_ of solution. What is the expected pH of the resulting solution If 9.24 g of sodium fluoride (NaF) are completely dissolved in water to result in a total of 1.0 L of solution, what is the expected pH of this solution In a triprotic acid, which Ka has the highest value K_a1 K_a2 K_b3 Which one of the following salts, when dissolved in water, produces the solution with a pH closest to 7.00 NH4Br CaO KHSO_4 Csl

Explanation / Answer

The answer is ka1.

The first Ka is always the largest (highest), because each successive proton is harder to remove than the very first one. Hence the Ka2 is smaller than Ka1 but larger than Ka 3. Ka3 would be the smallest because this proton is hardest to remove.

Ka1>>Ka2>>>Ka3

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