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Question

0.5 moles of H2SO4 is mixed with 0.2 moles of Ca(OH)2. The maximum number of moles of CaSO4 formed is:
Reaction: H2SO4+Ca(OH)2CaSO4+2H2O

A
0.2 mol
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B
0.5 mol
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C
0.4 mol
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D
1.5 mol
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Solution

The correct option is A 0.2 mol
The given balanced equation is, H2SO4+Ca(OH)2CaSO4+2H2O
1 mol of H2SO4 reacts with 1 mol of Ca(OH)2 to give 1 mol of CaSO4.
The amount of H2SO4=0.5 mol
The amount of Ca(OH)2=0.2 mol
Thus Ca(OH)2 is the limiting reagent.
Hence, the maximum number of moles of CaSO4 formed in the reaction is 0.2 mol.

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