Question 1

What is the molar concentration of sodium ions in a 0.450 mol L-1 Na3PO4 solution?

Accepted Answer

A) 0.150 mol L-1 
B) 0.450 mol L-1 
C) 1.35 mol L-1 
D) 1.80 mol L-1

Question 2

Define an electrolyte.

Accepted Answer

The answer of Define an electrolyte....

Question 3

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 mol L-1 Ca(NO3)2 solution to 150.0 mL.

Accepted Answer

A) 1.13 mol L-1 
B) 0.0887 mol L-1 
C) 0.0313 mol L-1 
D) 0.0199 mol L-1 
E) 0.0501 mol L-1

Question 4

There are ________ mol of bromide ions in 0.900 L of a 0.500 mol L^-1 solution of AlBr₃.

Accepted Answer

The answer of There are ________ mol of bromide ions...

Question 5

If the percent yield for the following reaction is 65.0%, how many grams of KClO3 are needed to produce 32.0 g of O2? 2KClO3(s)→ 2KCl(s)+ 3O2(g)

Accepted Answer

A) 53.1 g 
B) 81.7 g 
C) 126 g 
D) 283 g

Question 6

Which of the following describes acetic acid?

Accepted Answer

A) strong electrolyte, weak acid 
B) weak electrolyte, weak acid 
C) strong electrolyte, strong acid 
D) weak electrolyte, strong acid 
E) nonelectrolyte

Question 7

What is the molarity of a NaOH solution if 28.2 mL of a 0.355 mol L-1 H2SO4 solution is required to neutralize a 25.0 mL sample of the NaOH solution?

Accepted Answer

A) 0.801 
B) 0.315 
C) 0.629 
D) 125 
E) 0.400

Question 8

When 31.2 mL of 0.500 mol L-1 AgNO3 is added to 25.0 mL of 0.300 mol L-1 NH4Cl, how many grams of AgCl are formed? AgNO3(aq)+ NH4Cl(aq)→ AgCl(s)+ NH4NO3(aq)

Accepted Answer

A) 1.07 g 
B) 2.24 g 
C) 3.31 g 
D) 6.44 g

Question 9

How many H+ ions can the acid H2SO4 donate per molecule?

Accepted Answer

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

Question 10

A 14.01 g sample of N2 reacts with 3.02 g of H2 to form ammonia (NH3). If ammonia is the only product, what mass of ammonia is formed?

Accepted Answer

A) 17.03 g 
B) 1.10 g 
C) 14.01 g 
D) 3.02 g 
E) 23.07 g

Question 11

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-number coefficients?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) none of the above

Question 12

If 100. mL of 0.400 mol L-1 Na2SO4 is added to 200. mL of 0.600 mol L-1 NaCl, what is the concentration of Na+ ions in the final solution? Assume that the volumes are additive.

Accepted Answer

A) 0.534 mol L-1 
B) 0.667 mol L-1 
C) 1.00 mol L-1 
D) 1.40 mol L-1

Question 13

An acid solution is 0.100 mol L-1 in HCl and 0.200 mol L-1 H2SO4. What volume of a 0.150 mol L-1 KOH solution would completely neutralize 500.0 mL of this solution?

Accepted Answer

A) 0.700 L 
B) 1.98 L 
C) 1.67 L 
D) 1.02 L 
E) 0.250 L

Question 14

When silver nitrate reacts with barium chloride, silver chloride and barium nitrate are formed. How many grams of silver chloride are formed when 10.0 g of silver nitrate reacts with 15.0 g of barium chloride?

Accepted Answer

A) 8.44 g 
B) 9.40 g 
C) 11.9 g 
D) 18.8 g

Question 15

Identify the complete ionic equation for the reaction (if any)that occurs when aqueous solutions of lithium sulfide and copper(II)nitrate are mixed.

Accepted Answer

A) Li+(aq)+ SO42-(aq)+ Cu+(aq)+ NO3-(aq)→ CuS(s)+ Li+(aq)+ NO3-(aq) 
B) Li+(aq)+ S-(aq)+ Cu+(aq)+ NO3-(aq)→ CuS(s)+ LiNO3(aq) 
C) 2Li+(aq)+ S2-(aq)+ Cu2+(aq)+ 2NO3-(aq)→ Cu2+(aq)+ S2-(aq)+ 2LiNO3(s) 
D) 2Li+(aq)+ S2-(aq)+ Cu2+(aq)+ 2NO3-(aq)→ CuS(s)+ 2Li+(aq)+ 2NO3-(aq) 
E) No reaction occurs.

Question 16

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s)+ H2O(l)→ Ca(OH)2(s)
In a particular experiment, a 5.00 g sample of CaO is reacted with excess water and 6.11 g of Ca(OH)2 is recovered. What is the percent yield in this experiment?

Accepted Answer

A) 122 
B) 1.22 
C) 7.19 
D) 92.5 
E) 81.9

Question 17

Match the following.

-HCl(aq)+ (NH4)2S(aq)→ H2S(g)+ 2NH4Cl(aq)

Accepted Answer

A) acid-base 
B) oxidation-reduction 
C) combustion 
D) gas evolution

Question 18

What is the concentration of an AlCl3 solution if 150. mL of the solution contains 450. mg of Cl- ion?

Accepted Answer

A) 2.82 × 10-2 mol L-1 
B) 6.75 × 10-2 mol L-1 
C) 8.46 × 10-2 mol L-1 
D) 2.54 × 10-1 mol L-1

Question 19

How many millilitres of a 0.266 mol L-1 LiNO3 solution are required to make 150.0 mL of 0.075 mol L-1 LiNO3 solution?

Accepted Answer

A) 53.2 mL 
B) 42.3 mL 
C) 18.8 mL 
D) 23.6 mL 
E) 35.1 mL

Question 20

According to the balanced equation shown below, 4.00 moles of oxalic acid, H2C2O4, reacts with ________ moles of permanganate, MnO4-. 5H2C2O4(aq)+ 2MnO4-(aq)+ 6H+(aq)→ 10CO2(g)+ Mn2+(aq)+ 8H2O(l)

Accepted Answer

A) 1.60 
B) 4.00 
C) 8.00 
D) 9.00

Exam 4: Chemical Reactions and Stoichiometry

What is the molar concentration of sodium ions in a 0.450 mol L^-1 Na₃PO₄ solution?

Define an electrolyte.

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 mol L^-1 Ca(NO₃) ₂ solution to 150.0 mL.

There are ________ mol of bromide ions in 0.900 L of a 0.500 mol L^-1 solution of AlBr₃.

If the percent yield for the following reaction is 65.0%, how many grams of KClO₃ are needed to produce 32.0 g of O₂? 2KClO₃(s) → 2KCl(s) + 3O₂(g)

Which of the following describes acetic acid?

What is the molarity of a NaOH solution if 28.2 mL of a 0.355 mol L^-1 H₂SO₄ solution is required to neutralize a 25.0 mL sample of the NaOH solution?

When 31.2 mL of 0.500 mol L^-1 AgNO₃ is added to 25.0 mL of 0.300 mol L^-1 NH₄Cl, how many grams of AgCl are formed? AgNO₃(aq) + NH₄Cl(aq) → AgCl(s) + NH₄NO₃(aq)

How many H⁺ ions can the acid H₂SO₄ donate per molecule?

A 14.01 g sample of N₂ reacts with 3.02 g of H₂ to form ammonia (NH₃) . If ammonia is the only product, what mass of ammonia is formed?

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-number coefficients?

If 100. mL of 0.400 mol L^-1 Na₂SO₄ is added to 200. mL of 0.600 mol L^-1 NaCl, what is the concentration of Na⁺ ions in the final solution? Assume that the volumes are additive.

An acid solution is 0.100 mol L^-1 in HCl and 0.200 mol L^-1 H₂SO₄. What volume of a 0.150 mol L^-1 KOH solution would completely neutralize 500.0 mL of this solution?

When silver nitrate reacts with barium chloride, silver chloride and barium nitrate are formed. How many grams of silver chloride are formed when 10.0 g of silver nitrate reacts with 15.0 g of barium chloride?

Identify the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper(II) nitrate are mixed.

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H₂O(l) → Ca(OH) ₂(s) In a particular experiment, a 5.00 g sample of CaO is reacted with excess water and 6.11 g of Ca(OH) ₂ is recovered. What is the percent yield in this experiment?

Match the following. -HCl(aq) + (NH₄) ₂S(aq) → H₂S(g) + 2NH₄Cl(aq)

What is the concentration of an AlCl₃ solution if 150. mL of the solution contains 450. mg of Cl^- ion?

How many millilitres of a 0.266 mol L^-1 LiNO₃ solution are required to make 150.0 mL of 0.075 mol L^-1 LiNO₃ solution?

According to the balanced equation shown below, 4.00 moles of oxalic acid, H₂C₂O₄, reacts with ________ moles of permanganate, MnO₄^-. 5H₂C₂O₄(aq) + 2MnO₄^-(aq) + 6H⁺(aq) → 10CO₂(g) + Mn²⁺(aq) + 8H₂O(l)

Exam 4: Chemical Reactions and Stoichiometry

What is the molar concentration of sodium ions in a 0.450 mol L-1 Na3PO4 solution?

Define an electrolyte.

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 mol L-1 Ca(NO3) 2 solution to 150.0 mL.

There are ________ mol of bromide ions in 0.900 L of a 0.500 mol L-1 solution of AlBr3.

If the percent yield for the following reaction is 65.0%, how many grams of KClO3 are needed to produce 32.0 g of O2? 2KClO3(s) → 2KCl(s) + 3O2(g)

Which of the following describes acetic acid?

What is the molarity of a NaOH solution if 28.2 mL of a 0.355 mol L-1 H2SO4 solution is required to neutralize a 25.0 mL sample of the NaOH solution?

When 31.2 mL of 0.500 mol L-1 AgNO3 is added to 25.0 mL of 0.300 mol L-1 NH4Cl, how many grams of AgCl are formed? AgNO3(aq) + NH4Cl(aq) → AgCl(s) + NH4NO3(aq)

How many H+ ions can the acid H2SO4 donate per molecule?

A 14.01 g sample of N2 reacts with 3.02 g of H2 to form ammonia (NH3) . If ammonia is the only product, what mass of ammonia is formed?

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-number coefficients?

If 100. mL of 0.400 mol L-1 Na2SO4 is added to 200. mL of 0.600 mol L-1 NaCl, what is the concentration of Na+ ions in the final solution? Assume that the volumes are additive.

An acid solution is 0.100 mol L-1 in HCl and 0.200 mol L-1 H2SO4. What volume of a 0.150 mol L-1 KOH solution would completely neutralize 500.0 mL of this solution?

When silver nitrate reacts with barium chloride, silver chloride and barium nitrate are formed. How many grams of silver chloride are formed when 10.0 g of silver nitrate reacts with 15.0 g of barium chloride?

Identify the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper(II) nitrate are mixed.

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H2O(l) → Ca(OH) 2(s) In a particular experiment, a 5.00 g sample of CaO is reacted with excess water and 6.11 g of Ca(OH) 2 is recovered. What is the percent yield in this experiment?

Match the following. -HCl(aq) + (NH4) 2S(aq) → H2S(g) + 2NH4Cl(aq)

What is the concentration of an AlCl3 solution if 150. mL of the solution contains 450. mg of Cl- ion?

How many millilitres of a 0.266 mol L-1 LiNO3 solution are required to make 150.0 mL of 0.075 mol L-1 LiNO3 solution?

According to the balanced equation shown below, 4.00 moles of oxalic acid, H2C2O4, reacts with ________ moles of permanganate, MnO4-. 5H2C2O4(aq) + 2MnO4-(aq) + 6H+(aq) → 10CO2(g) + Mn2+(aq) + 8H2O(l)

What is the molar concentration of sodium ions in a 0.450 mol L^-1 Na₃PO₄ solution?

Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 mol L^-1 Ca(NO₃) ₂ solution to 150.0 mL.

There are ________ mol of bromide ions in 0.900 L of a 0.500 mol L^-1 solution of AlBr₃.

If the percent yield for the following reaction is 65.0%, how many grams of KClO₃ are needed to produce 32.0 g of O₂? 2KClO₃(s) → 2KCl(s) + 3O₂(g)

What is the molarity of a NaOH solution if 28.2 mL of a 0.355 mol L^-1 H₂SO₄ solution is required to neutralize a 25.0 mL sample of the NaOH solution?

When 31.2 mL of 0.500 mol L^-1 AgNO₃ is added to 25.0 mL of 0.300 mol L^-1 NH₄Cl, how many grams of AgCl are formed? AgNO₃(aq) + NH₄Cl(aq) → AgCl(s) + NH₄NO₃(aq)

How many H⁺ ions can the acid H₂SO₄ donate per molecule?

A 14.01 g sample of N₂ reacts with 3.02 g of H₂ to form ammonia (NH₃) . If ammonia is the only product, what mass of ammonia is formed?

If 100. mL of 0.400 mol L^-1 Na₂SO₄ is added to 200. mL of 0.600 mol L^-1 NaCl, what is the concentration of Na⁺ ions in the final solution? Assume that the volumes are additive.

An acid solution is 0.100 mol L^-1 in HCl and 0.200 mol L^-1 H₂SO₄. What volume of a 0.150 mol L^-1 KOH solution would completely neutralize 500.0 mL of this solution?

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H₂O(l) → Ca(OH) ₂(s) In a particular experiment, a 5.00 g sample of CaO is reacted with excess water and 6.11 g of Ca(OH) ₂ is recovered. What is the percent yield in this experiment?

Match the following. -HCl(aq) + (NH₄) ₂S(aq) → H₂S(g) + 2NH₄Cl(aq)

What is the concentration of an AlCl₃ solution if 150. mL of the solution contains 450. mg of Cl^- ion?

How many millilitres of a 0.266 mol L^-1 LiNO₃ solution are required to make 150.0 mL of 0.075 mol L^-1 LiNO₃ solution?

According to the balanced equation shown below, 4.00 moles of oxalic acid, H₂C₂O₄, reacts with ________ moles of permanganate, MnO₄^-. 5H₂C₂O₄(aq) + 2MnO₄^-(aq) + 6H⁺(aq) → 10CO₂(g) + Mn²⁺(aq) + 8H₂O(l)