Question

equivalent mass of H3PO4 for the given reaction

H3PO4 +Ca(OH)2 --> CaHPO4 + 2H2O

Answer 1

Answer: The equivalent mass of $H_3PO_4$ for the given reaction is 49 g eq.

Explanation:

$H_3PO_4$ is an acid and the equivalent mass of an acid is calculated by using the formula:

$\text{Equivalent mass}=\frac{\text{Molar mass of acid}}{\text{Number of replaceable hydrogen ions}}$

Molar mass of $H_3PO_4=[(3\times 1)+31+(4\times 16)]=98g/mol$

From the given reaction:

$H_3PO_4+Ca(OH)_2\rightarrow CaHPO_4+2H_2O$

As, the replaceable hydrogen ions in acid is 2, by putting the values in above equation, we get:

Equivalent mass of $H_3PO_4=\frac{98}{2}=49g.eq.$

Hence, The equivalent mass of $H_3PO_4$ for the given reaction is 49 g eq.

Answer 2

Answer:

:-

Explanation:

equivalent mass = molar mass of acid / no of replaceable H ions

Molar mass of H3Po4 = 98g/mol

2 replaceable h ions present so

equivalent mass = 98/2 =49 g