A solution of `K_2Cr_2O_7` containing `4.9gL^(-1)` is used to titrate `H_2O_2` solution containing `3.4gL^(-1)` in acidic medium. What volume of `K_2Cr_2O_7` will be required to react with 20 " mL of " `H_2O_2` solution? Also calculate the strength of `H_2O_2` in terms of available oxygen.

Explanation

To solve the problem step by step, we will follow these calculations:

### Step 1: Determine the equivalent mass of \( K_2Cr_2O_7 \)

The equivalent mass can be calculated using the formula:

\[
\text{Equivalent mass} = \frac{\text{Molar mass}}{\text{Valency}}
...