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```
A large lump of zinc is placed in 100 gram of solution of HCL. 150 ml of hydrogen at 15° C and 740 mm of Hg are evolved. calculate the percentage of HCl in the solution.

```
2 years ago

Shweta Ahire
44 Points
```							Use PV= NRT, for H2740/760 × 150/1000 = n × 0.0821 × 288n = Moles of H2 evolvedSo n = 0.00618Moles of HCl is same as the is half of the mole of H2 because HCl contain only H So moles of HCl = 0.00309Mass of HCl = 0.00309× 36.5 =  0.11 gm So percentage of HCl = 0.11/100  × 100 = 0.11%
```
2 years ago
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