Question

Complete the balanced molecular reaction for the following weak acid with a strong base:HNO2(aq) + Ca(OH)2 (aq)

Answer 1

Answer:

$2HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)$

Explanation:

Hello.

In this case, considering that the reaction between nitrous acid and calcium hydroxide yield both water and calcium nitrite as a neutralization chemical reaction:

$HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)$

As it is not balanced due to the two nitrites at the right, we obtain:

$2HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)$

Which means that 2 before the nitrous acid balance both nitrogen and oxygen.

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