What mass of lif is contained in 18.66 g of a 20.0% by mass solution of lif in water?

Question

Ochoa

Chemistry

2 July, 08:50

What mass of lif is contained in 18.66 g of a 20.0% by mass solution of lif in water?

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Carlie Pollard · Answer 1

Answer is: mass of lithium fluoride is 3,732 grams.

m (solution) = 18,66 g.

ω (solution) = 20% = 20% : 100% = 0,2.

m (LiF) = ?

ω (solution) = m (LiF) : m (solution).

m (LiF) = ω (solution) · m (solution).

m (LiF) = 0,2 · 18,66 g.

m (LiF) = 3,732 g.