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- 1. Multiple Choice
When you make a dilution, which of these values remains constant?
The molarity (M)
The total moles of solute
The volume (V)
The concentration
- 2. Multiple Choice
As we dilute a solution.....
The volume increases and the molarity (M) increases
The volume increases and the molarity (M) decreases
The volume decreases and the molarity (M) increases
The volume decreases and the molarity (M) decreases
- 3. Multiple Choice
When Na2O is added to water it reacts violently instead of making a solution. What is the molar mass of Na2O?
62 g/mol
39 g/mol
55 g/mol
100 g/mol
- 4. Multiple Choice
The term molar which is used to describe a solution's concentration, is written as?
M
mol
g
g/L
- 5. Multiple Choice
When a solution is heated until it boils, the molarity...
Doesn't change because everything evaporates
Decreases
Increases
Will become 1M
- 6. Multiple Choice
Molarity is ...
grams of solute/deciliters of solvent.
grams of solute/liters of solution.
moles of solute/liters of solution.
moles of solute/milliliters of solvent.
- 7. Multiple Choice
50 ml of a 1 M solution is diluted until the final volume is 80ml. How much water was added?
50 ml
1.3 ml
30 ml
130 ml
- 8. Multiple Choice
2 moles of H2O would weigh ____ grams
18 grams
9 grams
36 grams
2 grams
- 9. Multiple ChoiceWhat is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250 mL?15.9 M0.636 M0.642 M1.59 M
- 10. Multiple ChoiceWhat is the molarity of a solution made by adding 1.565 moles of PbNO3 to 500 mL?300. M31.3 M3.13 M1.56 M
- 11. Multiple ChoiceWhich sweet tea would you expect to taste the sweetest?1M3M3.1M2.5M
- 12. Multiple Choice
If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it?
.188 M
3.78 M
.389 M
1.76 M
- 13. Multiple Choice
The units "M" can also be written as:
mol/L
moles
g/L
g/mol
- 14. Multiple Choice
40 grams of NaOH = ________ moles
1
2
160
1600
- 15. Multiple Choice
If 1 mole of solute is dissolved in 1 liter of water, what is the molarity?
2M
.5M
1M
It can't be determined unless you know the solute
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