1. Solubility Curves Questions

3. 1. What is the maximum amount of K 2 CrO 4 that can be dissolved in 100g of water of 80°C? approximately: 70-72 grams

4. 2. What compound(s) appear to decrease in solubility as the temperature increases? Li 2 SO 4

5. 3. What is the effect of an increase in temperature in the solubility of NaCl? Very little effect, approximately 4-5 grams over 80°C of temperature.

6. 4. If you had a solution that contained 120g of NaClO 3 dissolved in 100g of water at 60°C, would it be saturated, unsaturated or supersaturated? It would be unsaturated since 120 grams falls below the solubility curve.

7. 5. What temperature must 100g of water be at to completely dissolve 70g of Pb(NO 3 ) 2 ? Approximately 40°C

8. 6. If you had a solution that contained 80g of KNO 3 at 48°C, would it be saturated, unsaturated or supersaturated? Saturated since it falls on the line or very close to it.

9. 7. Which has the higher solubility, K 2 CrO 4 at 30°C or NH 4 Cl at 75°C? K 2 CrO 4 = ~64g NH 4 Cl = ~62g

10. 8. If you had a 100g solution of water at 80°C that contained 30g of Ba(NO 3 ) 2, would it be saturated, unsaturated or supersaturated? VERY CLOSE: above the line = supersaturated, on the line = saturated

11. What is the maximum mass of KNO 3 that can dissolve in 100g of water at 55°C? ~90 grams