أسئلة اختيار من متعدد باللغة الإنجليزية للوحدة الرابعة Reactions in Aqueous Solution, Chapter 4 من كتاب CHEMISTRY THE CENTRAL SCIENCE

أسئلة اختيار من متعدد باللغة الإنجليزية للوحدة الرابعة Reactions in Aqueous Solution من كتاب CHEMISTRY THE CENTRAL SCIENCE

هذه الأسئلة أيضا تغطي :

• الوحدة الرابعة : Reactions in Aqueous Solutions من كتاب  Chemistry  13^th edition by: Raymond Chang and Jason Overby
• الوحدة الرابعة : Types of Chemical Reactions and Solution Stoichiometry من كتاب Chemistry 9^th edition by: Zumdhal

(باللون الأحمر هي الإجابة الصحيحة)

1. Which one of the following is a correct expression for molarity?
a) mol solute/L solvent

b) mol solute/mL solvent

c) mmol solute/mL solution

d) mol solute/kg solvent

e) μmol solute/L solution

2. Which one of the following is not true concerning 2.00 L of 0.100 M Ca₃(PO₄)₂ solution?
a) this solution contains 0.200 moles of Ca₃(PO₄)₂

b) this solution contains 0.800 mole of oxygen atoms

c) 1.00 L of this solution is required to furnish 0.300 mole of calcium atoms

d) 500.0 mL of this solution contains 6.02 x 1022 phosphorus atoms

3. How many moles of sodium ions are present in 4.57 L of 0.847 M Na₃P solution?
a) 0.847 M

b) 3.87 M

c) 0.185 M

d) 11.6 M

4. Which one of the following results in the formation of 0.200 M K₂SO₄ solution?
a) dilution of 250.0 mL of 1.00 M K₂SO₄ to 1.00 L

b) dissolving 43.6 g of K₂SO₄ in water and diluting to a total volume of 250.0 mL

c) diluting 20.0 mL of 5.00 M K₂SO₄ solution to 500.0 mL

d) dissolving 20.2 g of K₂SO₄ in water and diluting to 250.0 mL, then diluting 25.0 mL of this solution to a total volume of 500.0 mL

5. What is the molarity of NaCl in a solution made by mixing 25.0 mL of 0.100 M NaCl with 50.0 mL of 0.100 M NaCl?
a) 0.100 M

b) 0.0500 M

c) 0.0333 M

d) 0.0250 M

6. What is the molarity of CH₃OH in a solution prepared by dissolving 11.7 g of CH₃OH in 230 mL of solution?
a) 11.9 M

b) 1.59 X 10-3 M

c) 0.0841 M

d) 1.59 M

7. How many grams of H₃PO₄ are in 175 mL of a 3.5 M solution of H₃PO₄?
a) 0.61

b) 60

c) 20

d) 4.9

8. How many grams of CH₃OH would have to be added to water to prepare 150 mL of a solution that is 2.0 M CH₃OH?
a) 9.6 X 10³

b) 4.3 X 10²

c) 2.4

d) 9.6

9. How many moles of Br^– are present in 0.500 L of 0.300 M AlBr₃?
a) 0.150

b) 0.0500

c) 0.450

d) 0.167

e) 0.500

10. How many moles of Co²⁺ are present in 0.200 L of 0.400 M CoI₂?
a) 2.00

b) 0.500

c) 0.160

d) 0.0800

e) 0.0400

11. How many moles of K⁺ are present in 343 mL of 1.27 M K₃PO₄?
a) 0.436

b) 1.31

c) 0.145

d) 3.70

e) 11.1

12. What are the respective molar concentrations of Fe³⁺ and I^– afforded by dissolving 0.200 mol FeI₃ in water and diluting to 725 mL?
a) 0.276 and 0.828

b) 0.828 and 0.276

c) 0.276 and 0.276

d) 0.145 and 0.435

e) 0.145 and 0.0483

13. Calculate the molarity of sodium ions in a solution made by diluting 50.0 mL of 0.874 M sodium sulfide solution to a total volume of 250.0 mL.
a) 0.175 M

b) 4.37 M

c) 0.525 M

d) 0.350 M

e) 0.874 M

14. Dilution causes _________ in the concentration of the solute in a solution.
a) an increase

b) a decrease

c) no change

15. What is the concentration in M of an aqueous ethanol solution if 400 mL there of diluted to 4.00 L affords a concentration of 0.0400 M?
a) 0.400

b) 0.200

c) 2.00

d) 1.60

e) 4.00

16. Which one of the following will not break into ions upon dissolving in water?
a) C₂H₆SO

b) KBr

c) Cs₃PO₃

d) WC₁₆

e) AIP

17. What volume of 0.827 M KOH solution is required to completely neutralize 35.00 mL of 0.737 M H₂SO₄ solution?
a) 35.0 mL

b) 1.12 mL

c) 25.8 mL

d) 62.4 mL

e) 39.3 mL

18. Calculate the concentration of arsenic acid, H₃AsO₄, in a solution if 25.00 mL of that solution required 35.21 mL of 0.1894 M KOH for titration.
a) 0.2668 M

b) 0.8003 M

c) 0.08892 M

d) 0.1345 M

19. Calculate the concentration of mercury(l) ions, Hg₂²⁺, in a solution given that 30.00 mL of that solution required 43.23 mL of 0.8283 M NaCl for titration.
Hg₂²⁺ + 2NaCl → Hg₂Cl₂ + 2Na⁺
a) 1.194 M

b) 0.5968 M

c) 0.2984 M

d) 2.387 M

20. Calculate the percent of oxalic acid, H₂C₂O₄, in a solid given that a 0.7984 g sample of that solid required 37.98 mL of 0.2283 M NaOH for titration.
a) 48.89%

b) 97.78%

c) 28.59%

d) 1.086%

21. How many moles of BaCl₂ are formed via complete neutralization of 393 mL of 0.171 M Ba(OH)₂ with aqueous HCl?
a) 0.0672

b) 0.0336

c) 0.134

d) 2.30

e) 1.15

22. How many grams of AgBr are formed when 35.5 mL of 0.184 M AgNO₃ is treated with an excess of aqueous hydrobromic acid?
AgNO₃ + HBr → AgBr + HNO₃
a) 1.44

b) 1.23

c) 53.6

d) 34.5

e) 188

23. How many grams of CaF₂ are formed when 47.8 mL of 0.334 M NaF is treated with an excess of aqueous calcium(II) nitrate?
2NaF + Ca(NO₃)₂ → 2NaNO₃ + CaF₂
a) 1.25

b) 0.472

c) 2.49

d) 0.943

e) 0.623

24. A 17.5 mL sample of acetic acid (CH₃COOH) required 29.6 mL of 0.250 M NaOH to neutralize it. What was the molarity of the acetic acid solution?
a) 0.15

b) 0.423

c) 130

d) 6.8

25. Determine the number of liters of 0.250 M HNO3 required to neutralize a solution prepared by dissolving 17.5 g of NaOH in 350 mL of solution.
a) 50.0

b) 0.44

c) 1.75

d) 0.070

26. A 28.7 mL sample of KOH required 31.3 mL of 0.118 M HCl to neutralize it. How many grams of KOH were in the original sample?
a) 1.6

b) 7.2

c) 0.17

d) 0.203

27. The point in a titration at which the indicator changes is called the
a) equivalence point

b) indicator point

c) standard point

d) end point

e) volumetric point

28. Which one of the following would require the largest amount of 0.100 M sodium hydroxide solution for neutralization?
a) 10.0 mL of 0.0500 M phosphoric acid

b) 20.0 mL of 0.0500 M nitric acid

c) 5.0 mL of 0.0100 M sulfuric acid

d) 15.0 mL of 0.0500 M hydrobromic acid

e) 10.0 mL of 0.0500 M perchloric acid

29. You mix 60.0 mL of 1.00 M calcium nitrate, Ca(NO₃)₂ (164.1 g/mol), with 25.0 mL of 0.800 M potassium phosphate, K₃PO₄ (212.3 g/mol). What mass of calcium phosphate, Ca₃(PO₄)₂ (310.2 g/mol) should be formed?
2K₃PO₄ + 3Ca(NO₃)₂ → 6KNO₃ + Ca₃(PO₄)₂
A) 6.20 g

B) 3.10 g

C) 12.4 g

D) 9.31 g

30. In problem number 29, what is the molar concentration (M) of KNO₃ formed? Assume volumes are additive.
A) 1.05 M

B) 0.471 M

C) 0.706 M

D) 1.41 M

 

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