What volume of 5M Na2SO4 must be added ...

What volume of 5M `Na_2SO_4` must be added to 25 mL of 1M `BaCl_2` to produce 10 g of `BaSO_4` ?

8.58 mL

7.2 mL

10 mL

12 mL

Text Solution

Verified by Experts

`Na_2SO_4+BaCl_2 to BaSO_4 + 2NaCl`
No. moles of `BaSO_4=w/M=10/233=0.0429`
`therefore " No. of moles of " Na_2SO_4 " needed " = (MxxV)/(1000)`
or `0.0429=(5xxV)/(1000) rArr V=8.58mL`

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