Study Guide Unit 9
1. Define the following:
a. Solution- Homogeneous mixture
j. saturated- a solution that is full of solute (should not hold more)
b. Homogenous- a mixture with no identifiable parts
k. unsaturated- a solution that can hold more solute
c. Heterogeneous- a mixture with identifiable parts
l. supersaturated- a solution that holds more solute than it should
d. Soluble- Will dissolve
m. solute- substance that is dissolved
e. Insoluble- Will not dissolve
n. solvent- substance that does the dissolving
f. miscible- will mix together and form a solution
o. acid- more H than OH; pH less than 7
g. immiscible- cannot mix together to form a solution
p. base- more OH than H; pH greater than 7
h. solubility- amount of substance that will dissolve
i. alloy- solution of two metals
2. Do solutions always have to be between a solid and a liquid? NO
3. Under what conditions are salts most soluble? High Temperature
4. Use the solubility curve below to answer the following.
a. What mass of KNO3 will make a saturated solution at 60°C? 100 g
b. Which of the compounds shown on the solubility curve decrease solubility as temperature increases? NH3 and Ce2(SO4)3
c. What type of solution do I have if I add 110 g of NaNO 3 in 100g of 20°C water? Saturated (not supersaturated because of the
word “add” instead of “dissolve”)
d. What mass of KCl can go into solution at 80°C? 50 g
e. What is the least soluble compound at 20°C? KClO3
f. Excluding KI, what is the most soluble compound at 80°C?
KNO3
Solution
Saturated or
Unsaturated?
If unsaturated:
How much more
solute can
dissolve in the
solution?
a solution that
contains 80g of
NaNO3 at 30°C
Unsaturated
15
a solution that
contains 40g of
NH4Cl at 50°C
Unsaturated
10
a solution that
contains 20g of
KClO3 at 50°C
Saturated
a solution that
contains 60g of KI
at 0°C
Unsaturated
70
5. Calculate the molarity of the following.
a. 5.6 moles of sodium chloride in 450 milliliters of solution. 12.44 M
b. 19 grams of Na2SO4 in 12 L of solution. 0.0112 M
c. 0.75 grams of KI in 650 mL of solution. 0.00696 M
Study Guide Unit 9
6. Calculate the grams of solute needed to make the following solutions.
a. 5 liters of a 3 M solution of NaCl 876.6 g
b. 100 mL of a 5 M solution of NaOH 19.995 g
c. 300 mL of a 2M solution of C6H12O6 108.036 g
7. Complete the following dilution calculations
a. How much 0.5 M HCl solution can be made by diluting 350 mL of 10 M HCl? 7000 mL
b. How much water would I need to add to 350 mL of a 4.4 M KCl solution to make a 1.0 M solution? 1190 mL
c. If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 560 mL of water to it? .189 M
8. What type of compound will conduct electricity when dissolved in water? Ionic
9. If I dissolve 40 g of NaCl in water how will it affect the heating curve below? Draw the changes.
From notes/ quiz!!
10. Which of the following will conduct electricity when dissolved in water: LiF, Na2SO4, MgI2, SrCl2
11. Why is salt added to the roads during winter? Adding solute lowers the freezing point
12. What does the formula of an acid ALWAYS start with? Hydrogen
13. What does the formula of a base end in? Hydroxide
14. What is the pH range of an acid and a base? Acid = less than 7 ; Base = greater than 7
15. What are some properties of acids and bases? Acids taste sour; Bases taste bitter and feel slippery
16. Name the following acids:
a. HBr Hydrobromic Acid
d. H2CO3 Carbonic Acid
b. HClO3 Chloric Acid
e. HI Hydroiodic Acid
c. HNO2 Nitrous Acid
f. HNO3 Nitric Acid
17. Write the formula for the following acids:
a. Sulfous Acid H2SO3
d. hydrosulfic acid H2S
b. Hydrochloric acid HCl
e. Chloroic acid HClO3
c. acetic acid HC2H3O2
f. Perchloric acid HClO4
18. What is the pH of a 0.045 M solution of HCl? 1.3
19. What is the pH of a 0.023 M solution of HNO3? 1.6
20. What is the concentration of [H+] in a solution of HClO 3 with a pH of 5.5? 3.16 x 10-6
21. What is the concentration of [H+] in a solution of HBr with a pH of 3.5? 3.16 x 10-4
22. What is the pOH of a 0.013 M solution of NaOH? 1.88
23. What is the pOH of a 0.65 M solution of LiOH? .19
24. What is the concentration of [OH-] in a solution of Ca(OH)2 with a pH of 8.4? 3.98 x 10-9
25. What is the concentration of [OH-] in a solution of Mg(OH)2 with a pH of 7.1? 7.94 x 10-8
26. What is the pH of a 0.067 M solution of KOH? 12.8
27. What is the pH of a 0.089 M solution of LiOH? 12.95
28. What is the pOH of a 0.23 M solution of HI? 13.36
29. Determine the hydrogen ion concentration of 0.780 M aqueous solution of RbOH. 1.28 x 10-14
30. 160 ml of 2.2 M NaOH are required to titrate 140 ml of HF. What is the M of the HF? 2.5 M
31. What volume of 0.40 M NaOH would be required to titrate 17.0 ml of 0.15 M HCl? 6.375 mL
32. 140 ml of 3.1M H2SO4 are required to titrate 50 ml of NaOH to the equivalence point. What is the M of the NaOH? 17.36 M
33. 85 ml of 2.5M H2SO4 are required to titrate 20 ml of NaOH to the equivalence point. What is the M of the NaOH? 21.25 M