Solutions and Kinetics Test Review

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Presentation transcript:

Solutions and Kinetics Test Review College Chemistry

1) A solution is prepared by dissolving 21 g of Ca(OH)2 in enough water to make 40.0 mL of solution. Calculate the molarity of the solution. 2) How many grams of aluminum chloride are needed to prepare 5.0 L of 0.25 M solution? 3) What is the concentration in ppb of 0.000081 g of KNO3 dissolved in 2.7 kg of water?

4) At 80oC, how many grams of NaNO2 would you need to add to 100 g of water to saturate the solution?

5) If you cool a saturated solution of NaNO2 from 80oC to 20oC, how many grams of precipitate will form?

6) What is the molality of a solution of 12 grams of KCl dissolved in 5000.0 g of water? 7) Adding which of the following to 1.0 kg of water would result in a solution with the highest boiling temperature? a) 3.0 mol PCl5 b) 1.5 mol CaCl2 c) 50.0 g CH4 d) 50.0 g AlBr3

8) What is the freezing point of a solution that contains 68 8) What is the freezing point of a solution that contains 68.4 g of magnesium bromide dissolved in 250 g of water?

Solutions/Kinetics #2 9a) What is the order of this reaction with respect to H2? Which trials did you use to determine this? 9b) What is the order of this reaction with respect to NO? Which trials did you use to determine this? 9c) Write the overall rate equation.

10) Determine the units on the rate constant for the following rate law: rate = k[NH4+]2[NO2-]2 11) What is the rate of a third-order reaction that has a reactant concentration of 0.75M and a rate constant of 0.27 1/(M2s)? 12) If a reaction rate decreases by a factor of one-fourth when a reactant concentration is decreased by one-half, what is the order of the reaction with respect to that reactant?