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14.0 g of calcium metal is allowed to react with excess HCl at 1.0 atm pressure and 273 K. Which of the following statements is incorrect? [Given : Molar mass in g mol^-1 of Ca = 40, Cl = 35.5, H = 1 ]

1. 0.35 mol of H2 gas is evolved.
2. 7.84 L of H2 gas is evolved.
3. 33.3 of CaCl2 is produced.
4. The limiting reagent is calcium metal.

Correct answer: 33.3 of CaCl2 is produced.

Solution

The statement about producing 33.3 g of CaCl2 is incorrect because the reaction of calcium with HCl produces CaCl2 in a 1:2 molar ratio, and the amount of CaCl2 produced should be calculated based on the moles of calcium reacted, which would yield a different mass.

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