As you come in, Collect the following: Solubility Graph

Quiz, Concentration Quiz, paper, pencil, calculator, periodic table

Priorities:1. Correct the Solubility Graph Quiz2. Correct Concentration Quiz3. Solve Dilution Worksheet (1/2 sheet)4. Correct Colligative Properties Quiz5. PowerPoint practice questions

1.What is the molarity of a 125 mL solution in which 138.5 g of barium hydroxide are dissolved?

2.Determine the molality of a solution prepared by adding 243.6 g of aluminum nitrate to 750 g of water.

3.What volume of 0.8 M solution can be prepared if you have 47.8 g of Rb2SO4?

4.What mass of ammonium phosphite is needed to prepare 625 ml of 0.5 M solution?

5.What mass of H2SO4 is needed to prepare an aqueous 0.3 m H2SO4 solution containing 1,500 g of water?

1. What mass of ethylene glycol, HOCH2CH2OH must be added to 6000 g of water to produce an antifreeze solution that would protect a car radiator down to -21.2*C? Kf for H2O is 1.86*C/m.

2. Which of the following aqueous solutions will give the highest boiling point?

1. 0.1 m KI b) 0.1 m CaF2 c) 0.1 m AlPO4 d) 0.1 m Mg3(PO4)2 e) all of these solutions will have the same boiling point

3. Determine the freezing point of a solution prepared by dissolving 0.1 mol of Al(NO3)3 in 500 g of water. The Kf for water is 1.86*C/m.

4. The normal freezing point of carbon tetrachloride, CCl4, is -22.3*C. A solution which freezes at -35.7*C is prepared using C10H8 in 250 g of carbon tetrachloride whose Kf is 29.8*C/m. Determine the mass of C10H8 used.

5. The normal boiling point of ethanol is 78.4*C. If a solution is prepared by dissolving 14.8 g of AlBr3 in 750 g of ethanol, what will the boiling point of the new solution be? The Kb for ethanol is 1.22*C/m.

6. Which one of the following when dissolved in 100 g of water will give the solution of the lowest freezing point? Kf for H2O is 1.86*C/m. a) 10 g methanol, CH3OH b) 10 g ethanol, C2H5OH c) 10 g glucose, C6H12O6 d) 10 g glycerine, C3H8O3 e) the freezing point will be the same in all cases

7. A solution of 15.1 grams of a non-electrolyte in 0.391 kilograms of H2O freezes at -2.02*C at standard pressure. What is the molar mass of the compound? The Kf for H2O is 1.86*C/m.

Molarity, Molality and Dilution Practice1. How many grams of sodium

phosphate are needed to make 125mL of a 0.5M solution?

2. What is the molality of a solution made by dissolving 5.0g of toluene (C7H8) in 225 g of benzene (C6H6)?

3. How much additional water is needed to change the molarity of 350mL of 4M H2SO4 to a 2.5M solution?

Colligative Properties Practice How many particles in solution are

produced by each formula unit of potassium carbonate?

How many moles of particles would 3 mol sodium sulfate give in solution?

What is the boiling point of a solution that contains 2 mol of magnesium chloride in 100.0 g of water?

A solution of 4.69 g of a compound in 16.00 g of water boils at 100.83°C. What is the molar mass of the solute? Assume that the solute exists as molecules not ions.

Answers to the Practice K2CO3 contains 2 K+ ions and 1 CO3

-2 ion.

Use dimensional analysis. The solution gives 6 moles of Na+ ions and 3 moles of SO4

2- ions. The boiling point of water containing

2 moles of MgCl2 is 130.72°C. The molar mass of the compound is

180.8 grams/mole.