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

Question

Chemistry

Juliana Harris

2 December, 18:30

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

+2

Answers (1)

Know the Answer?

Avery Garrison · 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.