1- What is the mass percent of sodium chloride in a solution prepared by adding 15 g of sodium chloride to 75 g of water?
a) 20 % b) 17 % c) 18 % d) None of the above answer
2- How much sodium hydroxide is needed to make 225 g of a 15% NaOH solution?
a) 119 g b) 1.5 X 103g c) 34 g d) None of the above answer
3- What is the molarity of a solution prepared by dilution of 0.125 moles of sodium chloride to 2.50 x 102 mL with water?
a) 0.500 M b) 5.00 X 10-4
c) 2.00 M d) None of the above
4-7.5 g of acetic acid are diluted to 150 mL with water. What is the molarity of the acetic acid?
a) 50 M b) 8.3 X 10-4 M c) 0.33 M d) 0.83 M
5- How many grams of sodium hydroxide are needed to prepare 250 mL of a 0.20 M sodium hydroxide solution?
a) 0.50 g b) 2.0 X103 g c) 2.0 g d) None of the above
6-25 mL of 3.0 M sulfuric acid is diluted to 750 mL with water. What is the molarity of the resulting solution?
a) 90 M b) 0.011 M c) lO M d) 0.1 M
7- How many mL of a 6.0 M HC1 solution should be diluted to 1.5 L with water to prepare a 0.20 M HC1 solution?
a) 0.05 mL b) 5.0 X 101 mL
c) 4.5 X 104 mL d) 2.2 X 10 -5 mL
8- 5.0 mL of 0.35 M silver nitrate are diluted to 150 mL with water. What is the molarity of the resulting silver nitrate solution?
a) 0.35 M b) 10.5 M c) 0.095 M d) None of the above
9- How many grams of sodium nitrate are needed to prepare 250 mL of a 0.10 M solution?
a) 2.1 g b) 2.1 X 103 g c) 2.9 X 10-34 g d) 34 g
10- How many mL of a 0.400 M sodium hydroxide solution should be diluted to 350 mL with water to prepare a 5.00 x 10-3 M sodium hydroxide solution?
a) 2.8 X 104mL b) 3.57 X 105mL c) 4.38 mL d) 0.229 mL
11- 1.00 x 102 mL of water in equilibrium with air at 1 atm total pressure contains 9.3 x 104 g of oxygen. What is the molarity of oxygen in a saturated aqueous solution?
a) 2.9 X 10-4mol/L b) 9.3 X 10-3 mol/L
c) 2.9 X 10-5mol/L d) 2.9 X 106 mol/L
12- What are the concentrations of calcium and chloride ions respectively in a 0.10 M calcium chloride solution?
a) 0.10 M, 0.10 M b) 0.10 M, 0.20 M
c) 0.20 M, 0.10 M d) Both are 0.00 M
13- What are the concentrations of iron and sulfate ions respectively in a 0.25 M iron(III) sulfate solution?
a) 0.25 M, 0.25M b) 0.10 M, 0.20 M
c) 0.25 M, 0.75 M d) 0.50 M, 0.75 M
14- 100 ml of an aqueus saturated solution of calcium hydroxide contains 0.16 grams of calcium hydroxide at room temperature. What are the concentrations of calcium and hydroxide ions respectively in a saturated calcium hydroxide solution?
a) 4.3x10-2M, 2.2x10-2 M b) 2.2x10-2 M, 2.2x10-2 M
c) 2.2x10-2M, 4.3x10-2 M d) None of the previous answers.
15- 14.5 mL of 0.111 M sodium hydroxide are needed to titrate 25.0 mL of an HC1 solution to the end point. What is the molarity of the hydrochloric acid solution?
a) 0.0644 M b) 0.191 M
c) 5.23 M d) 15.5 M
16- 14.5 mL of 0.111 M sodium hydroxide are needed to titrate 10.0 mL of a sulfuric acid solution to the end point. What is the molarity of the sulfuric acid solution?
a) 0.161 M b) 0.322 M c) 0.0805 M d) 0.0383 M
17- 22.7 mL of 0.133 M silver nitrtate are needed to titrate 10.0 mL of a calcium chloride solution to the end point. What is the molarity of the calcium chloride solution?
a) 0.302 M b) 0.604 M c) 0.0293 M d) 0.151 M
18- Calculate the percent by mass of sucrose in a solution made be dissolving 4.00 g of sucrose in 46.0 g of water.
19- What mass of a 15.0 % by mass sucrose solution contains 25.0 g of sucrose?
20 - How many moles of NaOH are present in 50.0 mL of 0.500 M NaOH solution?
21- What is the concentration of Ca2+ ions and Ch ions in 25.0 mL of 0.300 M CaC12?
22- How many moles of a ions are present in 100. mL of 0.300 M CaC12 solution?
23- What mass of sodium chloride must be added to 50.0 mL of 2.00 Pb(NO3)2 solution to precipitate all of the lead ions?
24- How many mL of 0.100 M BaC12 solution are needed to react with 100. mL of 0.150 M Pb(NO3)2 solution?
25- What mass of PbC12 will precipitate when 100. mL of 2.40 M NaCl is mixed with 200. mL of 0.900 M Pb(NO3)2 solution?
In a titration at neutralization (indicated by an indicator), the number of moles of H+ is equal to the number of moles of OH-.
mol I-1+ = mol OH-
26- What volume of 0.250 M NaOH is needed to neutralize 30.0 mL of 0.200 M HC1 solution?
27- Tunis contains solid Ca(OH)2. What mass of Ca(OH)2 is needed to neutralize 100. mL of 0.200 M HC1?
28- What is the molarity of a H2SO4 solution if 25.0 mL of the acid is neutralized by 40.0 mL of 0.200 M NaOH?