Track Solute after Water Leaves - Practice 2

5 questions0m 0s

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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 6: 14 g nonvolatile salt dissolves in 65 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer

Question 2 Ideal paper model 7: 16 g nonvolatile salt dissolves in 70 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer

Question 3 Ideal paper model 8: 18 g nonvolatile salt dissolves in 75 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer

Question 4 Ideal paper model 9: 20 g nonvolatile salt dissolves in 80 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer

Question 5 Ideal paper model 10: 22 g nonvolatile salt dissolves in 85 g water. Only all the water evaporates. What mass of dry salt remains in g? Answer