Which compound would produce an acidic aqueous solution? Which compound would produce an acidic aqueous solution? RbH C2H2 PH3 CaH2 HF

Question

asked Jan 5, 2020 73.2k views

2 Answers

Pconrey · Answer 1 · 2020-01-09T17:19:44+0000

Answer: Option (e) is the correct answer.

Explanation:

A compound that will dissociate in water or an aqueous solution to give hydrogen ions(
H^(+) ) is known as an acidic substance.

When RbH is dissolved in aqueous solution then it dissociates as follows.

$RbH \rightarrow Rb^(+) + H^(-)$ .

C_(2)H_(2) is non-polar in nature. So, it will not dissociate into ions when dissolved in an aqueous solution.

PH_(3) will also remain neutral and does not dissociate into ions.

CaH_(2) when dissolved in water then it dissociates as follows.

$CaH_(2) \rightarrow Ca^(2+) + 2H^(-)$

Whereas when HF is dissolved in aqueous solution then the reaction will be as follows.

$HF \rightarrow H^(+) + F^(-)$

Thus, we can conclude that out of the given options HF is the compound which will produce an acidic aqueous solution.