Tag: properties of acids and bases

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Multiple choice chemistry acids, bases and salts metal oxides and non metal oxides reactions of acids and bases properties of acids and bases

Identify acidic salt which can react with one mole of base among the following.

  1. $(NH _{4}) _{2}CO _{3}$
  2. $Na _{2}HPO _{3}$
  3. $NaH _{2}PO _{3}$
  4. $CH _{3}COOK$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$H _3PO _3$ is a dibasic acid. In its structure, one oxygen atom is bonded to $P-$ atom via a double bond. $2$ $O-$atoms are bonded to $H-$atoms causing acidity. The third $H$ is directly attached to $P-$ atom responsible for its reducing behavior. 

In $NaH _2PO _3$, one acidic $H$ is replaced by $Na$. Only one $H$ is left which causes the acidic behavior in the salt and hence, will react with one mole of base.