Solutions Quiz 2

1. How many milliliters of 18.4 M H₂SO₄ are needed to prepare 600 mL of 0.10 M H₂SO₄?

1.8 mL

2.7 mL

3.3 mL

4.0 mL

4.6 mL

2. What is the MOLALITY of a solution of 50.0 g of propanol (molar mass = 60.1 g/mol) in 152 mL water, if the density of water is 1.0 g/mL?

5.47 m

0.00547 m

0.833 m

0.183 m

None of these

3. When 100. mL of 0.125 M HCl is diluted to 250. mL, the resulting MOLARITY of the HCl solution is:

0.625 M

0.250 M

0.0500 M

0.0250 M

None of these

4. A solution of hydrogen peroxide is 30.0% H₂O₂ by mass and has a density of 1.11 g/cm³. The MOLARITY of the solution is:

7.94 M

8.82 M

9.79 M

0.980 M

None of these

5. A solution containing 292.0 g of Mg(NO₃)₂ in 880 g of H₂O has a density of 1.108 g/mL. The MOLARITY of the solution is:

1.86 M

2.08 M

2.37 M

0.332 M

None of these

6. In a 0.1 molar solution of NaCl in water, which one of the following will be closest to 0.1?

The mole fraction of NaCl

The mass fraction of NaCl

The mass percent of NaCl

The molality of NaCl

All of these are about 0.1

7. Calculate the MOLALITY of C₂H₅OH in water solution which is prepared by mixing 50.0 mL of C₅H₂OH with 100.0 mL of H₂O at 20^oC. The density of the C₂H₅OH is 0.789 g/mL at 20^oC.

0.086 m

0.094 m

1.24 m

8.56 m

None of these

8. A solution containing 296.6 g of Mg(NO₃)₂ per liter has a density of 1.114 g/mL. The MOLARITY of the solution is:

2.000 M

2.446 M

6.001 M

1.805 M

None of these

9. A solution containing 292 g of Mg(NO₃)₂ per liter has a density of 1.108 g/mL. The MOLALITY of the solution is:

2.00 m

2.41 m

5.50 m

6.39 m

None of these

10. Calculate the MOLALITY of C₂H₅OH in a water solution which is prepared by mixing 100.0 mL of C₂H₅OH with 100.0 mL of H₂O at 20^oC. The density of the C₂H₅OH is 0.789 g/mL at 20^oC.

0.082 m

0.102 m

1.28 m

17.1 m

None of these