Question

How many grams of concentrated sulphuric acid $$(80\%\ w/w)$$ should be used to prepare $$100\ mL$$ of one molar $$H_{2}SO_{4}$$?

A
10 g
B
12.25 g
C
15 g
D
17.5 g

Solution

The correct option is D $$12.25\ g$$Grams of concentrated sulphuric acid needed = $$1N\times 49\times 0.250\ liter=12.25\ grams.$$For example, if we take $$6.9 mL$$ of concentrated sulfuric acid and diluted it to $$250 mL$$, you would have a $$1 N H_{ 2 }{ SO }_{ 4 }$$ solution.Conclusion: Hence, the option $$(B)$$ is correct.Chemistry

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