What is the supplied substance lithium will react with water if 1 liter of hydrogen is released as a result of the reaction.

univerkov | July 1, 2021 | education

Given:
V (H2) = 1 L

To find:
m (Li) -?

1) 2Li + 2H2O => 2LiOH + H2 ↑;
2) n (H2) = V / Vm = 1 / 22.4 = 0.04 mol;
3) n (Li) = n (H2) * 2 = 0.04 * 2 = 0.08 mol;
4) m (Li) = n * M = 0.08 * 7 = 0.56 g.

Answer: The mass of Li is 0.56 g.

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