WATER SECTION C.1 – C.6 QUIZ
Name______
Date______Period______
SOLUBILITY CURVES (C.1)
Use the solubility curve provided to answer the following questions.
1. What is the solubility of potassium chloride (KCl) in 100 g of water at 60° C? ______
_
2. What is the minimum temperature required to get 120 g of potassium nitrate (KNO3) to dissolve in 100 g of water? ______
3. If there are 110 g of potassium nitrate (KNO3) dissolved in 100 g of water at 70° C, is the solution saturated, unsaturated, or supersaturated? ______
4. If 120 g of sodium chloride (NaCl) are added to 100 g of water at 80° C, how much of the solute will NOT dissolve? ______
5. How many grams of potassium nitrate will dissolve in 500 g of water at 50° C? ______
______
CALCULATING SOLUTION CONCENTRATIONS (C.2)
percent solution = (g solute / g solution) x 100
A drink mix requires 27 g of powder to be dissolved in 300 mL of water.
6. What is the mass of the solute? ______
7. What is the mass of the solvent? ______
8. What is the mass of the solution? ______
9. What is the % concentration of the solution? ______
10. Express the concentration in pph ______
11. Express the concentration in ppm ______
12. How many Kilograms of mix would be required if you needed to make 50 L of the solution? (Remember that 1 mL = 1g and 1L = 1000ml) ______
GAS SOLUBILITY AND AQUATIC ENVIRONMENTS (C.3 & C.4)
13. The three major ways that oxygen can be dissolved in water are ______, ______, and ______.
14. The type of pollution that raises water temperature is: ______.
15. After a warm spell, provide three factors that can contribute to a fish kill: ______, ______, ______.
16. As water temperature increases, the solubility of gas ______.
17. The type of bacteria that require oxygen to survive are called ______.
(C.6 ACIDS AND BASES)
Match the name of the Acid or Base with the correct formula.
18._____HCl A. Potassium Hydroxide
19._____Mg(OH)2 B. Hydrochloric Acid
20._____H2SO4 C. Calcium Hydroxide
21._____H2CO3 D. Sulfuric Acid
22._____NaOH E. Sodium Hydroxide
23._____KOH F. Magnesium Hydroxide
24._____H3PO4 G. Carbonic Acid
25._____HNO3 H. Acetic Acid
26._____Ca(OH)2 I. Phosphoric Acid
27._____HC2H3O2 J. Nitric Acid
28. Acids generally provide which ion when they dissociate in water?: ______
29. Bases generally provide which ion when they dissociate in water?: ______
30. If a solution reacts by bubbling when a piece of Magnesium metal is added to it, one can generally assume the solution is a(n): ______.
31. The pH of an acid could be:
a) 7 b) 5 c) 8 d) 10
32. The pH of a base could be:
a) 6.9 b) 3.02 c) 8.5 d) 1