Chemistry · Various concepts of acids and bases (Arrhenius, Bronsted Lowry and Lewis) and their ionization, acid-base equilibria (including multistage ionization) and ionization constants

Which is a set of acid salts and can react with base?

A. \( N a H_{2} P O_{2}, N a_{2} H P O_{3}, N a H_{2} P O_{4} \)
B. \( N a_{2} H P O_{3}, N a H_{2} P O_{3}, N a H P O_{4} \)
C. \( \operatorname{NaHCO}_{3}, \operatorname{NaH}_{2} \mathrm{PO}_{3}, \mathrm{Na}_{2} \mathrm{HPO}_{4} \)
D. All of the above

Step-by-step solution

An acid salt contains replaceable hydrogen atoms that can react with a base. NaHCO3 (bicarbonate) has one acidic H, NaH2PO3 (monosodium phosphite) has one acidic H from the OH group of phosphorous acid, and Na2HPO4 (disodium hydrogen phosphate) has one acidic H. All three are acid salts that can donate H+ to bases. In contrast, NaH2PO2 (hypophosphite) and Na2HPO3 (with H on P) are not acid salts because their remaining H is not acidic. Therefore, only option C consists entirely of acid salts.

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Step-by-step solution

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