Question

In a mixture of 25.0g CaCl2, 40.0g LiCl, and 300 g of water , the mole percent of water is:

A. 93

B. 5.3

C. 1.3

The solubility of a substance in 100g water is 50g at 25oC. 55 g of the substance is dissolved in water at 40oC and cooled to 25oC, no crystals appear. The solution is

A. supersaturated

B. saturated

C. unsaturated

The mass percent, %(m/m), for 55.0g KOH in 178.0g H2O is:

A. 55

B. 24

C. 178

D. 31

Calculate the M of a 4.1m KCl solution if it's density is 1.10g/ml

A. 3.0

B. 29

C. 3.5

Calculate the N of 20g H3PO4 in 500ml of solution (assume all H+ enter solution)

A. 1.2

B. 4.1

C. 2.8