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An aqueous solution is prepared by dissolving 0.23 mol of nitrous acid and 0.27 mol of sodium ...

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An aqueous solution is prepared by dissolving 0.23 mol of nitrous acid and 0.27 mol of sodium ...

An aqueous solution is prepared by dissolving 0.23 mol of nitrous acid and 0.27 mol of sodium nitrite 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 K_a of nitrous acid is 1.36 × 10^-3.

▸ H₂O

▸ H₃O⁺

▸ nitrite ion

▸ nitrous acid

▸ This is a buffer solution: the pH does not change at all upon addition of acid or base.

Textbook

General Chemistry: Principles and Modern Applications

Edition: 11^th

Authors: Petrucci, Herring, Madura, Bissonnette

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