This document contains a worksheet with multiple choice and short answer questions about solutions and solubility, molarity, percent concentration, and water purification. The questions cover topics like solubility curves, saturated solutions, units of solubility, factors that affect solubility, distinguishing between solute and solvent, and steps in water purification processes.

1. Name ________________________________________________________ Group ___________
Date __________________________________________________________ List # _____________
Worksheet # 4
Solutions and Solubility practice
1.- What is the x axis for a solubility curve?
a) Grams of solvent per 100 grams of water
b) Grams of solute per 100 grams of water
c) Temperature of the solute
d) Temperature of the solvent
2.- What is the y axis for a solubility chart?
a) Grams of solvent per 100 grams of water
b) Grams of solute per 100 grams of water
c) Temperature of the solute
d) Temperature of the solvent
3.- What are the common units used to express solubility?
a) g solute/g solvent b)g solute/ 100 g water c)Molarity d)% by mass
4.- Use the solubility curve to answer the following questions:
What is the solubility of KNO3 at 40 C?
_________________________________________
Which of the following are saturated
solutions?
a)50 g CaCl2 in 100 g water at 10 C_________
b)10 g KClO3 in 50 g water at 50 C __________
c) 70 g of K2Cr2O7 in 100 g water at 90 C
_______________
5.- In a mixture of 50 mL of benzene(nonpolar) and 48 mL of octane(nonpolar),
a) which substance is the solute?___________
b)which substance is the solvent?___________
c)Using the concept of “like dissolves like” would these two substances form a solution?
(yes/no) ______________ Explain________________________________________________
6.- Compare three bottles of soda. Bottle A was stored at room temperature (25°C),
bottle B was stored at 10°C, and bottle C was stored at 30°C.
a) If you wanted a fizzy drink, which bottle would you choose? _____________ why?
_______________________________________________________________________________
7.- Classify the following as soluble or insoluble
a)PbBr2 b)KCl c)AgI d)Na2SO4 e)NaNO3
8.- Describe the properties of a true solution. (5)

2. 9.- Define the following terms:
a)soluble
b)insoluble
c)miscible
d)immiscible
10.- Describe 3 ways in which you can increase the speed at which a solid dissolves.
Molarity practice
1.- Find the molarity of the following solutions:
a)0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.
b) 0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution.
c) 0.5 grams of sodium chloride is dissolved to make 0.05 mL of solution.
2.- Find the amount of grams of solute needed to prepare the following solutions:
a) 200 ml of a 2.5 M CaCO3 solution
b) 2L of a 2.5 M MgCO3 solution
3.- How would you prepare (solute and solvent needed) the following solutions:
a)1500 ml of a 3M HCl solution

3. Percent concentration
1.- What amount of sugar and water are needed to prepare 700 ml of a 15% solution?
2.- Calculate the % by mass of a solution containing 35 g HCl in 1200 ml solution.
3.- What volume of methanol is in a 400 ml bottle containing a 45% methanol solution?
Water
1.- Sketch a flow chart showing the steps used to purify water in a purification plant.
2.- Describe what happens at each stage of the purification process.