what volume of 5M Na2SO4 must be added to 25ml of 1M BaCl2 to produce 10g of BaSO4

1. The reaction is :

     Na2SO4 + BaCl​2 BaSO4 + 2NaCl

2. Number of moles of BaSO410233.3=0.04 moles
3. 1 mole of sodium sulphate gives 1 mole of barium sulphate
so, 0.04 moles of sodium sulphate will gibe 0.04 moles of barium sulphate.

4. 5 moles of sodium sulphate is present in 1 L of the solution,
so, 0.04 moles of sodium sulphate is given by 8ml (using unitary method).

5. We need to add 8 ml of sodium sulphate solution.

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