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2. Acids, Bases and Salts
easy
Name the sodium compound which is used for softening hard water.
A
$ Mg(OH)_2 $
B
$ Ca{(OH)} _{3} $
C
$Al_{2} O _{3} $
D
$Na _{2} CO _{3} \cdot 10 H _{2} O$
Solution
Washing soda $\left( Na _{2} CO _{3} \cdot 10 H _{2} O \right)$ is used for softening hard water.
Standard 10
Science
