How many grams of water are needed to react with 15.0 grams of li2o? given: li2o+h2o→2lioh?

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Chemistry

17 December, 21:50

How many grams of water are needed to react with 15.0 grams of li2o? given: li2o+h2o→2lioh?

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Kali Moss · Answer 1

Answer is: 9 grams of water are needed to react.

Chemical reaction: Li₂O + H₂O → 2LiOH.

m (Li₂O) = 15 g.

n (Li₂O) = m (Li₂O) : M (Li₂O).

n (Li₂O) = 15 g : 30 g/mol.

n (Li₂O) = 0,5 mol.

From chemical reaction: n (Li₂O) : n (H₂O) = 1 : 1.

n (H₂O) = 0,5 mol.

m (H₂O) = 0,5 mol · 18 g/mol.

m (H₂O) = 9 g.