Section 2

1. b, c
2. a, b
3. b, c
4. a, d
5. b, d
6. a, c, d
7. a, c, d
8. d
9. c
10. a, b, c

Section 3

1. a, c, d
2. b
3. c
4. b, d
5. a, b, c, d
6. b, c
7. a, c, d
8. c
9. b, c
10. c

Section 4

1. b
2. d
3. c
4. b
5. b
6. a
7. c
8. d
9. b
10. c
11. d

Section 5

1. c
   
2. b
3. a, d
4. a, d, e, g
5. b, c
6. c, d
7. b
8. d
9. b, d
10. c, d
11. c

Section 6

1. iron, sulfate, total dissolved solids, lead
2. 45,000 mg/L, 232,500 mg/L, 4.5 g/L, 1.2 oz/ gal
3. 5.0 g/L, no
4. 9.5 g/L, no
5. c
6. c, d
7. c
8. a
9. See the graphs below.
10. yes, ion exchange

Section 7

1. a, c, d
2. a, b
3. a
4. b, c
5. b
6. a

Section 8

1. b, c, d
2. a, c
3. a, b, c
4. a, b, c, d
5. b, c, d