Adapted by Nelson Nuñez-Rodriguez
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By David W. Ball
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| QUESTION | ANSWER |
|
1. Differentiate between molarity and molality. |
1. Molarity is moles per liter, whereas molality is moles per kilogram of solvent. |
|
3. What is the molarity of a solution made by dissolving 13.4 g of NaNO3 in 345 mL of solution? |
3. 0.457 M |
|
5. How many moles of MgCl2 are present in 0.0331 L of a 2.55 M solution? |
5. 0.0844 mol |
|
7. What volume of 0.556 M NaCl is needed to obtain 0.882 mol of NaCl? |
7. 1.59 L |
|
9. What volume of 0.333 M Al(NO3)3 is needed to obtain 26.7 g of Al(NO3)3? |
9. 0.376 L |
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11. What are the individual ion concentrations and the total ion concentration in 0.66 M Mg(NO3)2? |
11. Mg2+ = 0.66 M; NO3− = 1.32 M; total: 1.98 M |
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13. If the C2H3O2– ion concentration in a solution is 0.554 M, what is the concentration of Ca(C2H3O2)2? |
13. 0.277 M |