SOLUTIONS TO EXERCISES, LESSON 2
1. Type II water (paras 2-11, 2-13)
2.
Colloidal solution (para 2-22)
3. 600 g (paras 2-27, 2-28)
4. 1.0 mg (paras 2-27, 2-28)
5. 5.0 mL (paras 2-27, 2-30)
6. 270.0 mL (para 2-30)
7. 800.0 mL (paras 2-27, 2-28)
NOTE:
First, calculate total volume (300 mL). This includes both the water and the
toluene. Subtract the amount of solute (30 mL) to get the volume of water
needed.
8. .368
9. .072 g (para 2-32)
10. 0.75 g (para 2-29)
11. 18.8 g (para 2-29)
12. a.
12.0 g (paras 2-27, 2-28)
b.
15.2 g (paras 2-27, 2-28)
c.
4.6 g (paras 2-27, 2-28)
d.
40.0 mg (paras 2-27, 2-28)
e.
4.2 mg (paras 2-27, 2-28)
f.
390.0 mL (para 2-30)
13. 89.6 g (para 2-32)
14. 21 g (para 2-32)
NOTE:
When preparing a solution in which acid is diluted, always fill the volumetric
flask approximately half full with deionized water, then slowly add the acid.
This is an exothermic reaction (heat is produced), and the solution must be
cooled to room temperature before adjusting the volume to the mark.
End of Lesson 2
MD0837
2-22