A solution of `K_(2)cr_(2)O_(7)` contanining `4.9 gL^(-1)` is used to tirate `H_(2)O_(2)` solution contaning `3.4 gL^(-1)` in acidic medium. What volume of `K_(2)Cr_(2)O_(7)` will be required to react with `20 mL` of `H_(2)O_(2)` solution ? Also calculate the strength of `H_(2)O_(2)` in terms of available oxygen.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Calculate the Molarity of K₂Cr₂O₇
Given that the strength of K₂Cr₂O₇ is 4.9 g/L, we need to find its molarity.

1. **Molar Mass Calculation**:
- The molar mass of K₂Cr₂O₇ = (2 × 39.1) + (2 × 52) + (7 × 16) = 294 g/mol.

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