Problem: Which pair of compounds act as a buffer in aqueous solution?a. H3PO4 (phosphoric acid) and H2PO4- (dihydrogen phosphate ion)b. NaCN (sodium cyanide) and KOH (potassium hydroxide)c. HCIO4 (perchloric acid) and NaOH (sodium hydroxide) 

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Which pair of compounds act as a buffer in aqueous solution?

a. H3PO4 (phosphoric acid) and H2PO4- (dihydrogen phosphate ion)

b. NaCN (sodium cyanide) and KOH (potassium hydroxide)

c. HCIO4 (perchloric acid) and NaOH (sodium hydroxide)

 

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