Reference no: EM131291215

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?