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Aqueous solutions of HNO(3), KOH, CH(3)C...

Aqueous solutions of `HNO_(3), KOH, CH_(3)COOH`,and `CH_(3)COONa` of identical concentrations are provided. The pair (s) of solution which form a buffer upon mixing is// are

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In `HNO_(3)`and `CH_(3)COONa`combination, if `HNO_(3)`is present in limiting amount, it will be neutralized completely, leaving behind some excess of `CH_(3)COONa`
`CH_(3)COONa + HNO_(3) rarr CH_(3)COOH + NaNO_(3)`
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