Calculate equivalent weight of `H_(3)PO_(4)` and `Ca(OH)_(2)` on the basis of given reaction.
`H_(3)PO_(4)+ NaOH to NaH_(2)PO_(4)+ H_(2)O`
`Ca(OH)_(2)+ HCL to Ca(OH)CL+ H_(2)O`

Explanation

To calculate the equivalent weight of \( H_3PO_4 \) and \( Ca(OH)_2 \) based on the given reactions, we will follow these steps:

### Step 1: Understand the concept of equivalent weight
The equivalent weight of a substance can be calculated using the formula:
\[ \text{Equivalent Weight} = \frac{\text{Molecular Weight}}{n} \]
where \( n \) is the number of equivalents, which is determined by the number of H\(^+\) ions (for acids) or OH\(^-\) ions (for bases) that can be released or accepted in a reaction.
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