Question

An aqueous solution of which of the following compounds will have a $pH$ < 7?

• A. $TiC{l}_4$
• B. $FeC{l}_3$
• C. $CuS{O}_4$
• D. All of these

Answer 1

The correct option is D All of these

Salts of strong acid and weak base will have `pH` less than 7.

$TiC{l}_4+H_{2}O\to Ti(OH{)}_2+HCl$
$FeC{l}_3+H_{2}O\to Fe(OH{)}_3+HCl$
$CuS{O}_4+H_{2}O\to Cu(OH{)}_2+H_{2}S{O}_4$

All of these compounds are the salts of strong acid and weak base. So all compounds have `pH` less than 7.