Question 1

What is the oxidation number of the chromium atom in Na2CrO4 ?

Accepted Answer

A)  -2 
B)  +2 
C)  +6 
D)  +7 
A)  -2 
B)  +2 
C)  +6 
D)  +7

Question 2

When 220.mL of 1.50 × 10-4 M hydrochloric acid is added to 135 mL of 1.75 × 10-4 M Mg(OH)2,the resulting solution will be

Accepted Answer

A)  acidic. 
B)  basic 
C)  neutral. 
D)  It is impossible to tell from the information given. 
A)  acidic. 
B)  basic 
C)  neutral. 
D)  It is impossible to tell from the information given.

Question 3

Which one of the following compounds behaves as an acid when dissolved in water?

Accepted Answer

A)  CaO 
B)  C2H6 
C)  H F 
D)  NaOH 
A)  CaO 
B)  C2H6 
C)  H F 
D)  NaOH

Question 4

6.74 g of the monoprotic acid KHP (MW = 204.2 g/mol)is dissolved into water.The sample is titrated with a 0.703 M solution of calcium hydroxide to the equivalence point.What volume of base was used?

Accepted Answer

A)  8.64 mL 
B)  11.8 mL 
C)  23.5 mL 
D)  47.0 mL 
E)  93.9 mL 
A)  8.64 mL 
B)  11.8 mL 
C)  23.5 mL 
D)  47.0 mL 
E)  93.9 mL

Question 5

Define a spectator ion.

Accepted Answer

An ion tha

Question 6

How many chloride ions are present in 65.5 mL of 0.210 M Al Cl3 solution?

Accepted Answer

A)  4.02 × 1023 chloride ions 
B)  5.79 × 1024 chloride ions 
C)  2.48 × 1022 chloride ions 
D)  8.28 × 1021 chloride ions 
E)  1.21 × 1022 chloride ions 
A)  4.02 × 1023 chloride ions 
B)  5.79 × 1024 chloride ions 
C)  2.48 × 1022 chloride ions 
D)  8.28 × 1021 chloride ions 
E)  1.21 × 1022 chloride ions

Question 7

How many molecules of sucrose (C12H22O11,molar mass = 342.30 g/mol)are contained in 14.3 mL of 0.140 M sucrose solution?

Accepted Answer

A)  8.29 × 1022 molecules C12H22O11 
B)  1.21 × 1021 molecules C12H22O11 
C)  6.15 × 1022 molecules C12H22O11 
D)  1.63 × 1023 molecules C12H22O11 
E)  5.90 × 1024 molecules C12H22O11 
A)  8.29 × 1022 molecules C12H22O11 
B)  1.21 × 1021 molecules C12H22O11 
C)  6.15 × 1022 molecules C12H22O11 
D)  1.63 × 1023 molecules C12H22O11 
E)  5.90 × 1024 molecules C12H22O11

Question 8

How many of the following compounds are insoluble in water?
NaC2H3O2 BaSO4 SrS AlPO4

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 9

Determine the oxidation state of nitrogen in NaNO3.

Accepted Answer

A)  +5 
B)  +3 
C)  0 
D)  +2 
E)  +4 
A)  +5 
B)  +3 
C)  0 
D)  +2 
E)  +4

Question 10

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Al(C2H3O2)3 and LiNO3 are mixed.

Accepted Answer

A)  Al3+(aq) + 3 NO3-(aq) → Al(NO3)3(s) 
B)  Li+(aq) + C2H3O2-(aq) → LiC2H3O2(s) 
C)  Al3+(aq) + 3 NO3-(aq) + Li+(aq) + C2H3O2-(aq) → Al(NO3)3(aq) + LiC2H3O2(s) 
D)  3 Li+(aq) + (C2H3O2)33-(aq) → Li3(C2H3O2)3(s) 
E)  No reaction occurs. 
A)  Al3+(aq) + 3 NO3-(aq) → Al(NO3)3(s) 
B)  Li+(aq) + C2H3O2-(aq) → LiC2H3O2(s) 
C)  Al3+(aq) + 3 NO3-(aq) + Li+(aq) + C2H3O2-(aq) → Al(NO3)3(aq) + LiC2H3O2(s) 
D)  3 Li+(aq) + (C2H3O2)33-(aq) → Li3(C2H3O2)3(s) 
E)  No reaction occurs.

Question 11

How can you tell if a reaction is an oxidation-reduction reaction?

Accepted Answer

At least one species is losing electrons

Question 12

Which pair of compounds is soluble in water?

Accepted Answer

A)  Hg2Cl2 and Hg2Br2 
B)  NiS and Li2S 
C)  NH 4 I and Ni(NO3)2 
D)  Li NO3 and CuCO3 
A)  Hg2Cl2 and Hg2Br2 
B)  NiS and Li2S 
C)  NH 4 I and Ni(NO3)2 
D)  Li NO3 and CuCO3

Question 13

If 4.89 g of ZnCl2 is dissolved in enough water to give a total volume of 500 mL,what is the molarity of the solution?

Accepted Answer

A)  0.217 M 
B)  0.0179 M 
C)  0.0717 M 
D)  1.33 M 
E)  0.849 M 
A)  0.217 M 
B)  0.0179 M 
C)  0.0717 M 
D)  1.33 M 
E)  0.849 M

Question 14

Which of the following solutions will have the highest electrical conductivity?

Accepted Answer

A)  0.045 M Al2(SO4)3 
B)  0.050 M (NH4)2CO3 
C)  0.10 M NaBr 
D)  0.10 M KI 
E)  0.10 M KF 
A)  0.045 M Al2(SO4)3 
B)  0.050 M (NH4)2CO3 
C)  0.10 M NaBr 
D)  0.10 M KI 
E)  0.10 M KF

Question 15

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Accepted Answer

A)  NH4NO3 + Na2CO3 
B)  Hg2(NO3)2 + Li Cl 
C)  NaCl + Li3PO4 
D)  AgC2H3O2 + Cu(NO3)2 
E)  None of the above solution pairs will produce a precipitate. 
A)  NH4NO3 + Na2CO3 
B)  Hg2(NO3)2 + Li Cl 
C)  NaCl + Li3PO4 
D)  AgC2H3O2 + Cu(NO3)2 
E)  None of the above solution pairs will produce a precipitate.

Question 16

How many milliliters of 0.260 M Na2S are needed to react with 25.00 mL of 0.315 M AgNO3?
Na2S(aq)+ 2 AgNO3(aq)→ 2 NaNO3(aq)+ Ag2S(s)

Accepted Answer

A)  15.1 mL 
B)  30.3 mL 
C)  41.3 mL 
D)  60.6 mL 
A)  15.1 mL 
B)  30.3 mL 
C)  41.3 mL 
D)  60.6 mL

Question 17

When an aqueous solution of manganese (II)nitrate is combined with an aqueous solution of ammonium sulfide,what should precipitate out?

Accepted Answer

A)  MnS 
B)  Mn(SO3)2 
C)  Mn(SO4)2 
D)  Mn2SO3 
E)  Mn2SO4 
A)  MnS 
B)  Mn(SO3)2 
C)  Mn(SO4)2 
D)  Mn2SO3 
E)  Mn2SO4

Question 18

A student dissolved 5.00 g of Co(NO3)2 in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO3- ion are there in the final solution?

Accepted Answer

A)  0.0 247 g 
B)  0.0 493 g 
C)  0.0 678 g 
D)  0. 136 g 
A)  0.0 247 g 
B)  0.0 493 g 
C)  0.0 678 g 
D)  0. 136 g

Question 19

Determine the name for H FO3.

Accepted Answer

A)  hydro fluoric acid 
B)  hydro fluorus acid 
C)  fluorate acid 
D)  fluoric acid 
E)  per fluoric acid 
A)  hydro fluoric acid 
B)  hydro fluorus acid 
C)  fluorate acid 
D)  fluoric acid 
E)  per fluoric acid

Question 20

How many grams of CaCl2 are formed when 25.00 mL of 0.00237 M Ca(OH)2 reacts with excess Cl2 gas?
2 Ca(OH)2(aq)+ 2 Cl2(g)→ Ca(OCl)2(aq)+ CaCl2(s)+ 2 H2O(l)

Accepted Answer

A)  0.00 329 g 
B)  0.00 658 g 
C)  0.0 132 g 
D)  0.0 304 g 
A)  0.00 329 g 
B)  0.00 658 g 
C)  0.0 132 g 
D)  0.0 304 g

Exam 9: Introduction to Solutions and Aqueous Reactions

What is the oxidation number of the chromium atom in Na2CrO4 ?

When 220.mL of 1.50 × 10-4 M hydrochloric acid is added to 135 mL of 1.75 × 10-4 M Mg(OH)2,the resulting solution will be

Which one of the following compounds behaves as an acid when dissolved in water?

6.74 g of the monoprotic acid KHP (MW = 204.2 g/mol)is dissolved into water.The sample is titrated with a 0.703 M solution of calcium hydroxide to the equivalence point.What volume of base was used?

Define a spectator ion.

How many chloride ions are present in 65.5 mL of 0.210 M Al Cl3 solution?

How many molecules of sucrose (C12H22O11,molar mass = 342.30 g/mol)are contained in 14.3 mL of 0.140 M sucrose solution?

How many of the following compounds are insoluble in water? NaC2H3O2 BaSO4 SrS AlPO4

Determine the oxidation state of nitrogen in NaNO3.

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Al(C2H3O2)3 and LiNO3 are mixed.

How can you tell if a reaction is an oxidation-reduction reaction?

Which pair of compounds is soluble in water?

If 4.89 g of ZnCl2 is dissolved in enough water to give a total volume of 500 mL,what is the molarity of the solution?

Which of the following solutions will have the highest electrical conductivity?

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

How many milliliters of 0.260 M Na2S are needed to react with 25.00 mL of 0.315 M AgNO3? Na2S(aq)+ 2 AgNO3(aq)→ 2 NaNO3(aq)+ Ag2S(s)

When an aqueous solution of manganese (II)nitrate is combined with an aqueous solution of ammonium sulfide,what should precipitate out?

A student dissolved 5.00 g of Co(NO3)2 in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO3- ion are there in the final solution?

Determine the name for H FO3.

How many grams of CaCl2 are formed when 25.00 mL of 0.00237 M Ca(OH)2 reacts with excess Cl2 gas? 2 Ca(OH)2(aq)+ 2 Cl2(g)→ Ca(OCl)2(aq)+ CaCl2(s)+ 2 H2O(l)

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

What is the oxidation number of the chromium atom in Na₂CrO₄?

When 220.mL of 1.50 × 10^-4M hydrochloric acid is added to 135 mL of 1.75 × 10^-4 M Mg(OH)₂,the resulting solution will be

How many chloride ions are present in 65.5 mL of 0.210 M Al Cl₃ solution?

How many molecules of sucrose (C₁₂H₂₂O₁₁,molar mass = 342.30 g/mol)are contained in 14.3 mL of 0.140 M sucrose solution?

How many of the following compounds are insoluble in water? NaC₂H₃O₂BaSO₄ SrS AlPO₄

Determine the oxidation state of nitrogen in NaNO₃.

Give the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Al(C₂H₃O₂)₃ and LiNO₃ are mixed.

If 4.89 g of ZnCl₂ is dissolved in enough water to give a total volume of 500 mL,what is the molarity of the solution?

How many milliliters of 0.260 M Na₂S are needed to react with 25.00 mL of 0.315 M AgNO₃? Na₂S(aq)+ 2 AgNO₃(aq)→ 2 NaNO₃(aq)+ Ag₂S(s)

A student dissolved 5.00 g of Co(NO₃)₂ in enough water to make 100.mL of stock solution.He took 4.00 mL of the stock solution and then diluted it with water to give 275.mL of a final solution.How many grams of NO₃^- ion are there in the final solution?

Determine the name for H FO₃.

How many grams of CaCl₂ are formed when 25.00 mL of 0.00237 M Ca(OH)₂ reacts with excess Cl₂ gas? 2 Ca(OH)₂(aq)+ 2 Cl₂(g)→ Ca(OCl)₂(aq)+ CaCl₂(s)+ 2 H₂O(l)