Track Solute after Water Leaves - Practice 1

5 questions0m 0s

Learn the skill

A dissolved substance has not simply vanished. In this ideal paper model only water evaporates, all nonvolatile solute stays, and nothing is spilled. The dry residue equals the initial solute mass. This is not an instruction to heat a sample.

Worked example

A model solution contains 8 g salt and 40 g water. If only all the water evaporates, 8 g salt remains.

Question 1 Ideal paper model 1: 4 g nonvolatile salt dissolves in 40 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer

Question 2 Ideal paper model 2: 6 g nonvolatile salt dissolves in 45 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer

Question 3 Ideal paper model 3: 8 g nonvolatile salt dissolves in 50 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer

Question 4 Ideal paper model 4: 10 g nonvolatile salt dissolves in 55 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer

Question 5 Ideal paper model 5: 12 g nonvolatile salt dissolves in 60 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer