Question 1

Potassium carbonate, K2CO3, sodium iodide, NaI, potassium bromide, KBr, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Accepted Answer

A) K 2CO 3 
B) NaI 
C) KBr 
D) CH 3OH 
E) NH 4Cl

Question 2

A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

Accepted Answer

A) 0.0524 M 
B) 0.888 M 
C) 1.13 M 
D) 2.26 M 
E) 2.43 M

Question 3

Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.85 mL of 0.453 M hydrochloric acid.

Accepted Answer

A) 28.5 mol 
B) 1.04 mol 
C) 0.139 mol 
D) 0.0285 mol 
E) 0.00721 mol

Question 4

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4)3PO4, is dissolved in water?

Accepted Answer

A) 0.40 mol 
B) 1.6 mol 
C) 3.2 mol 
D) 4.8 mol 
E) 6.4 mol

Question 5

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq) → 2KMnO4(aq) + KCl(aq) + H2O(l)

Accepted Answer

A) Mn in MnO 2 is oxidized. 
B) O in KClO 3 is the oxidizing agent. 
C) K in KClO 3 is the reducing agent. 
D) H in KOH is oxidized. 
E) Cl in KClO 3 is the reducing agent.

Question 6

Identify all the spectator ions in the following reaction. 2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq) → K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4)3(aq) + 8H2O(l)

Accepted Answer

A) only K + 
B) only SO 4 2− 
C) only K + and SO 4 2− 
D) only K +, SO 4 2−, and Fe 2+ 
E) only K +, SO 4 2−, Fe 2+, and Mn 2+

Question 7

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO4(aq) + (NH4)3PO4(aq) →

Accepted Answer

A) cobalt(II)phosphate, Co 3(PO 4)2 
B) cobalt(III)phosphate, Co 3(PO 4)2 
C) cobalt(II)phosphate, CoPO 4 
D) cobalt(III)phosphate, CoPO 4 
E) ammonium sulfate, (NH 4)2SO 4

Question 8

Which of the following solutions will be the poorest conductor of electrical current?

Accepted Answer

A) sucrose, C 12H 22O 11( aq) 
B) Sodium chloride, NaCl( aq) 
C) Potassium nitrate, KNO 3( aq) 
D) Lithium hydroxide, LiOH( aq) 
E) Sulfuric acid, H 2SO 4( aq)

Question 9

The combustion of an element is always a combination reaction.

Accepted Answer

A) True 
 B)False

Question 10

A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

Accepted Answer

A) True 
 B)False

Question 11

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Accepted Answer

A) 2.543 mol 
B) 1.383 mol 
C) 0.7232 mol 
D) 0.3932 mol 
E) 0.001383 mol

Question 12

Lithium hydroxide is used in alkaline batteries. Calculate the molarity of a solution prepared by dissolving 1.495 moles of LiOH in enough water to give a final volume of 750. mL.

Accepted Answer

A) 1.99 M 
B) 1.50 M 
C) 1.12 M 
D) 0.502 M 
E) 0.00199 M

Question 13

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 (ℳ = 106.45 g/mol).

Accepted Answer

A) 419 g 
B) 169 g 
C) 0.419 g 
D) 0.169 g 
E) 0.00394 g

Question 14

Select the classification for the following reaction. 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

Accepted Answer

A) Precipitation 
B) Acid-base 
C) Redox 
D) Combination 
E) None of these choices are correct.

Question 15

Which one of the following is not a redox reaction?

Accepted Answer

A) 2H 2( g)+ O 2( g)→ 2H 2O( l) 
B) Zn( s)+ H 2SO 4( aq)→ ZnSO 4( aq)+ H 2( g) 
C) H 2O( l)+ NH 3( g)→ NH 4+( aq)+ OH −( aq) 
D) 6FeSO 4( aq)+ K 2Cr 2O 7( aq)+ 7H 2SO 4( aq)→ Cr 2(SO 4)3( aq)+ 3Fe 2(SO 4)3( aq)+ K 2SO 4( aq)+ 7H 2O( l) 
E) Cl 2( g)+ 2KBr( aq)→ Br 2( l)+ 2KCl( aq)

Question 16

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na5P3O10.

Accepted Answer

A) +3 
B) +5 
C) +10 
D) +15 
E) None of these choices are correct.

Question 17

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 (ℳ = 84.02 g/mol)? HCl(aq) + NaHCO3(s) → NaCl(s) + H2O(l) + CO2(g)

Accepted Answer

A) 638 mL 
B) 572 mL 
C) 536 mL 
D) 276 mL 
E) 175 mL

Question 18

Predict the product(s) for the following reaction. BaO(s) + CO2(g) →

Accepted Answer

A) Ba( s)+ CO 3( g) 
B) BaCO 3( s) 
C) BaO( s)+ C( s) 
D) Ba( s)+ CO 3 2-( s) 
E) No reaction occurs.

Question 19

In a redox reaction, the oxidizing agent undergoes loss of electrons.

Accepted Answer

A) True 
 B)False

Question 20

Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Accepted Answer

A) 0.184% 
B) 1.63% 
C) 3.26% 
D) 5.43% 
E) 9.23%

Exam 4: Three Major Classes of Chemical Reactions

Potassium carbonate, K₂CO₃, sodium iodide, NaI, potassium bromide, KBr, methanol, CH₃OH, and ammonium chloride, NH₄Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.85 mL of 0.453 M hydrochloric acid.

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH₄) ₃PO₄, is dissolved in water?

Select the best statement relating to the following reaction: 2MnO₂(s) + KClO₃(aq) + 2KOH(aq) → 2KMnO₄(aq) + KCl(aq) + H₂O(l)

Identify all the spectator ions in the following reaction. 2KMnO₄(aq) + 10FeSO₄(aq) + 8H₂SO₄(aq) → K₂SO₄(aq) + 2MnSO₄(aq) + 5Fe₂(SO₄) ₃(aq) + 8H₂O(l)

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO₄(aq) + (NH₄) ₃PO₄(aq) →

Which of the following solutions will be the poorest conductor of electrical current?

The combustion of an element is always a combination reaction.

A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Lithium hydroxide is used in alkaline batteries. Calculate the molarity of a solution prepared by dissolving 1.495 moles of LiOH in enough water to give a final volume of 750. mL.

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO₃(ℳ = 106.45 g/mol) .

Select the classification for the following reaction. 2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)

Which one of the following is not a redox reaction?

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na₅P₃O₁₀.

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO₃(ℳ = 84.02 g/mol) ? HCl(aq) + NaHCO₃(s) → NaCl(s) + H₂O(l) + CO₂(g)

Predict the product(s) for the following reaction. BaO(s) + CO₂(g) →

In a redox reaction, the oxidizing agent undergoes loss of electrons.

Vinegar is a solution of acetic acid, CH₃COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Exam 4: Three Major Classes of Chemical Reactions

Potassium carbonate, K2CO3, sodium iodide, NaI, potassium bromide, KBr, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.85 mL of 0.453 M hydrochloric acid.

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4) 3PO4, is dissolved in water?

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq) → 2KMnO4(aq) + KCl(aq) + H2O(l)

Identify all the spectator ions in the following reaction. 2KMnO4(aq) + 10FeSO4(aq) + 8H2SO4(aq) → K2SO4(aq) + 2MnSO4(aq) + 5Fe2(SO4) 3(aq) + 8H2O(l)

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO4(aq) + (NH4) 3PO4(aq) →

Which of the following solutions will be the poorest conductor of electrical current?

The combustion of an element is always a combination reaction.

A particular reaction may be both a precipitation and an acid-base (neutralization) reaction.

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Lithium hydroxide is used in alkaline batteries. Calculate the molarity of a solution prepared by dissolving 1.495 moles of LiOH in enough water to give a final volume of 750. mL.

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 (ℳ = 106.45 g/mol) .

Select the classification for the following reaction. 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

Which one of the following is not a redox reaction?

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na5P3O10.

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 (ℳ = 84.02 g/mol) ? HCl(aq) + NaHCO3(s) → NaCl(s) + H2O(l) + CO2(g)

Predict the product(s) for the following reaction. BaO(s) + CO2(g) →

In a redox reaction, the oxidizing agent undergoes loss of electrons.

Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Potassium carbonate, K₂CO₃, sodium iodide, NaI, potassium bromide, KBr, methanol, CH₃OH, and ammonium chloride, NH₄Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH₄) ₃PO₄, is dissolved in water?

Select the best statement relating to the following reaction: 2MnO₂(s) + KClO₃(aq) + 2KOH(aq) → 2KMnO₄(aq) + KCl(aq) + H₂O(l)

Identify all the spectator ions in the following reaction. 2KMnO₄(aq) + 10FeSO₄(aq) + 8H₂SO₄(aq) → K₂SO₄(aq) + 2MnSO₄(aq) + 5Fe₂(SO₄) ₃(aq) + 8H₂O(l)

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO₄(aq) + (NH₄) ₃PO₄(aq) →

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO₃(ℳ = 106.45 g/mol) .

Select the classification for the following reaction. 2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na₅P₃O₁₀.

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO₃(ℳ = 84.02 g/mol) ? HCl(aq) + NaHCO₃(s) → NaCl(s) + H₂O(l) + CO₂(g)

Predict the product(s) for the following reaction. BaO(s) + CO₂(g) →

Vinegar is a solution of acetic acid, CH₃COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?