A solution is prepared by dissolving 0.23 mol of hypochlorous acid and 0.27 mol

Question

A solution is prepared by dissolving 0.23 mol of hypochlorous acid and 0.27 mol of sodium hypochlorite in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly. The pH does not decrease drastically because the HCl reacts with the ________ present in the buffer solution. The Ka of hypochlorous acid is 3.0 × 10-8. Select and answer below

1 hypochlorous acid 2 H2O 3 H3O+ 4 hypochlorite ion 5 This is a buffer solution: the pH does not change upon addition of acid or base.

Explanation / Answer

answer : hypochlorite ion

Explanation :

if HCl is added to this buffer solution.the H+ react with OCl- (conjugate base) which is already present in the buffer.

so the pH does not drastically decrease.

ClO-   +    HCl    ----------------> HClO

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