In 1000 g of water at 20 degrees, 1.56 g of calcium hydroxide, 38 g of barium hydroxide dissolve

In 1000 g of water at 20 degrees, 1.56 g of calcium hydroxide, 38 g of barium hydroxide dissolve. Determine the mass fractions of substances in these solutions

The mass of water is 1000 g.

Calcium hydroxide mass – 1.56 g.

Barium hydroxide mass – 38 g.

Let us determine the mass fractions of compounds in the resulting solution.

W = m r.v. / m r-ra * 100%.

Determine the mass of the resulting solution.

m solution = mH2O + m Ca (OH) 2 + mBa (OH) 2.

m solution = 1000 + 1.56 + 38 = 1039.56 g.

Next, we determine the mass fraction of calcium hydroxide.

W = 1.56 / 1039.56 = 0.0015; 0.15%.

Next, we determine the mass fraction of barium hydroxide.

W = 38 / 1039.56 * 100 = 3.7%.

Answer: the mass fraction of calcium hydroxide is 0.15%; mass fraction of barium hydroxide 3.7%.