C.2 questions #1-3 p.56

1. a) 105 grams

    b) 47 grams

2. a) 20 grams

    b) 20 grams 

3. a) 90 grams

    b) 200 grams of water would have to be added

1SCS #1-8 p.82 

1. Three teaspoons of sugar will completely dissolve in a serving of hot tea, but will not dissolve in an equally sized serving of iced tea because because of the difference in mixtures. The hot water has a bigger gap for the molecules, allowing more space for the sugar molecules to fit in between. 

2. The maximum mass of potassium chloride that will dissolve in 100.0 g water at 70 degrees c is 48 grams. 

3. a) 100.0 mL water

4. 80 degrees C then 20 degrees C.

5. Saturated means that there is so much of a substance that you cannot dissolve anymore of it. An unsaturated solution is a solution that contains less dissolved solute than the amount that the solvent can normally hold at that temperature. 

6. a) 30 grams

    b) supersaturated

    c) 35 grams

7. a) The crystal will dissolve into the solution.

    b) The crystals will remain undissolved at the bottom of the solution. 

    c) Solid crystals will form and will settle to the bottom of the solution. 

8. 1.5 x 35g = 52.5%