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Molarity

100

What is the molarity of a solution when 2.75 moles of NaCl are dissolved in 5.2 L of solution 

0.53 M

200

What is the molarity of a solution when 3.25 moles of CaCl₂ are dissolved in 950 mL of solution?

3.4 M

300

How many moles of NaCl must be dissolved in .9L of solution to make a 2.4 M solution?

2.16 moles of NaCl

400

How many grams of NaCl must be dissolved in 0.9 L of solution to make a 1.75 M solution?

92.1 grams of NaCl

500

If 29.25 grams of NaCl were dissolved in enough water to make 1500 mL of solution, what is the molarity of this solution?

0.33 M

PPM/% by Mass

100

What is the concentration of a solution in parts per million if 0.23 grams of a solute is dissolved in 3500 grams of solution?

65.7

200

How many grams of solute must be dissolved in water to form 250 grams of a 3.75% solution?

9.4 grams

300

How many grams of lead would be dissolved in 2500 grams of a 0.05 ppm solution?

0.000125 g or 1.25 x 10^-4 g

400

What is the percent composition by mass of a solution formed by dissolving 52.7 grams of NaCl into 547.3 grams of water?

8.8%

500

Which of the following is the most concentrated solution?

A. 1 mole dissolved in 3.2 L of solution

B. 2 moles dissolved in 7.0 L of solution

C. 4 moles dissolved in 14 L of solution

D. 3 moles dissolved in 6.2 L of solution

D 

Tables F & G

100

According to solubility guidelines Chemistry Reference Tables, which of the following is most soluble in water?

A. PbCl₂

B. CaSO₄

C. TiCrO₄

D. NH₄S

D

200

According to Solubility Curves Reference Table, what mass of NH₄Cl must be dissolved in 100. grams of water at 55 ⁰C to make a saturated solution?

54 grams

300

Would the following solution be saturated, unsaturated or supersaturated?

110 grams of NaNO₃ dissolved in 200 grams of water at 10 ⁰C?

Unsaturated

400

If a 100 gram sample of a saturated solution of KClO₃ was made at 100 ⁰C, how much would precipitate out of the solution when it is cooled to 20 ⁰C?

52 grams

500

Which of the following would be most soluble in water?

A. CS₂

B. PF₃

C. CCl₄

D. N₂

B

Gas Laws & Heat

100

How much heat is required to raise the temperature of 50 grams of water by 10 ⁰C?

2090 joules

200

A 250 L sample of He (g) is placed in a rigid container at STP.  What is the new temperature of the gas if the pressure is increased to 336 kPa if the volume remains constant?

905.5 K

300

How much heat is required to boil 225 grams of water at 100 ⁰C?

508, 500 Joules

400

A hot air balloon with a capacity of 5000 L is filled with air on the surface of the earth at STP.  The anchors are removed an the balloon rises into the sky to a height where the temperature drops to -8 ⁰C and the atmopsheric pressure is 0.75 atm.  What is the volume of air that is now in the balloon?

4,689 L

500

250 J of heat are added to 10 grams of water.  If the temperature of the water started at 20 ⁰C, what is the final temperature of the water?

79.8 ⁰C

Catch All

100

Which sample would have the highest reaction rate?

Sample A - 25 ⁰C, 0.5 M, no catalyst, 10 cm² of surface area

Sample B - 50 ⁰C, 1.0 M, catalyst present, 20 cm² of surface area

Sample C - 75 ⁰C, 1.2 M, no catalyst, 15 cm² of surface area

Sample D - 100⁰C, 1.1 M, catalyst present, 20 cm² of surface area

D

200

Which sample below would have the lowest freezing point?

1 M solution of KCl

1 M solution of C₂H₅Cl

1 M solution of TiCl₃

1 M solution of NH₄OH

1 M solution of TiCl₃

300

At what temperature will propanone boil if the atmospheric pressure is 200 kPa?

78 ⁰C

400

Which of the following will react with AgNO₃ to produce a precipitate?

A. NaCl

B. LiC₂H₃O₂

C. Ca(ClO₃)₂

D. CaSO₄

Both A & D

500

Compare the number of moles of molecules in the two samples below:

Sample 1:  20 mL, 1 atm, 283 K

Sample 2: 20 mL, 101.3 kPa, 10 ⁰C

they have the sampe pressure, temp and volume..Therefore they have the same number of moles.