Question

Calculate the equivalent weight of sulphuric acid.
$(H=1,S=32,O=16)$

• A. $39u$
• B. $44u$
• C. $23u$
• D. $49u$

Answer 1

The correct option is D $49u$

The molecular formula of sulfuric acid is $H_{2}S{O}_4$.
Its molecular mass is $=(1\times 3)+32+(16\times 4)=2+32+64=98u$
The expression for the equivalent weight of an acid is as given below.
Equivalent weight $=\frac{\text{Molecular mass}}{\text{Number of replaceable H}}$
sulfuric acid contains two replaceable hydrogen.
Substitute values in the above expression.
Equivalent weight $=\frac{98}{2}=49u$