Question 1

One of the characteristics of an acid-base reaction is that this type of reaction forms water.

Accepted Answer

A) True 
 B)False

Question 2

Before a chemical equation can be written,one must know:

Accepted Answer

A) the atomic mass of all the elements involved. 
B) the molar mass of all the compounds. 
C) the symbols and formulas of all reactants and products. 
D) the number of moles of all reactants and products. 
E) none of the above. 
A) the atomic mass of all the elements involved. 
B) the molar mass of all the compounds. 
C) the symbols and formulas of all reactants and products. 
D) the number of moles of all reactants and products. 
E) none of the above.

Question 3

What would be the formula of the precipitate that forms when Pb(NO3)2 (aq)and K2SO4 (aq)are mixed?

Accepted Answer

A) K(NO3)2 
B) PbSO4 
C) PbK2 
D) H2O 
E) none of the above 
A) K(NO3)2 
B) PbSO4 
C) PbK2 
D) H2O 
E) none of the above

Question 4

Considering the following precipitation reaction: 
Pb(NO3)2(aq)+ 2KI(aq)→ PbI2(s)+ 2KNO3(aq)
What is the correct net ionic equation?

Accepted Answer

A) Pb2+ + I2- → PbI2(s) 
B) 2NO3- + 2K+ → 2KNO3 
C) Pb2+ + 2NO3- + 2K+ + 2I- → PbI2(s)+ 2K+ + 2NO3- 
D) Pb2+ + 2I- → PbI2(s) 
E) none of the above 
A) Pb2+ + I2- → PbI2(s) 
B) 2NO3- + 2K+ → 2KNO3 
C) Pb2+ + 2NO3- + 2K+ + 2I- → PbI2(s)+ 2K+ + 2NO3- 
D) Pb2+ + 2I- → PbI2(s) 
E) none of the above

Question 5

Methane gas (CH4),on complete combustion in air,produces: 
1.CO2
2.H2
3.H2O

Accepted Answer

A) 1 and 2 only 
B) 1 and 3 only 
C) 2 and 3 only 
D) All of 1 and 2 only 
E) None of 
A) 1 and 2 only 
B) 1 and 3 only 
C) 2 and 3 only 
D) All of 1 and 2 only 
E) None of

Question 6

Which of the following statements about balancing reactions is FALSE?

Accepted Answer

A) If there is no coefficient or subscript,a one is implied. 
B) When coefficients are added the type of compounds is changed in the chemical reaction. 
C) Subscripts are multiplied by the coefficients to determine the number of atoms in a compound. 
D) Coefficients are added to compounds to ensure both sides of the reaction have equal numbers of each atom. 
E) All of the above statements are true. 
A) If there is no coefficient or subscript,a one is implied. 
B) When coefficients are added the type of compounds is changed in the chemical reaction. 
C) Subscripts are multiplied by the coefficients to determine the number of atoms in a compound. 
D) Coefficients are added to compounds to ensure both sides of the reaction have equal numbers of each atom. 
E) All of the above statements are true.

Question 7

What are the coefficients for the following reaction when it is properly balanced? ___potassium iodide + ___lead (II)acetate → ___lead (II)iodide +___potassium acetate

Accepted Answer

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

Question 8

The net ionic equation for the reaction of sodium hydroxide plus hydrochloric acid is   .

Accepted Answer

A) True 
 B)False

Question 9

All of the following compounds are soluble in water EXCEPT:

Accepted Answer

A) NaCl. 
B) CaCl2. 
C) FeCl3. 
D) NH4Cl. 
E) PbCl2. 
A) NaCl. 
B) CaCl2. 
C) FeCl3. 
D) NH4Cl. 
E) PbCl2.

Question 10

When a solution of MgCl2 and one of AgNO3 are mixed,the net ionic equation is:

Accepted Answer

A) Mg2+(aq)+ 2Cl-(aq)+ 2Ag+(aq)+ 2NO3- (aq)→ Mg2+(aq)+ 2NO3-aq)+ 2AgCl(s) 
B) Mg2+(aq)+ 2Cl-(aq)+ 2Ag+(aq)+ 2NO3- (aq)→ Mg(NO3)2 (aq)+ 2 AgCl(s) 
C) Mg2+(aq)+ 2NO3-(aq)→ Mg(NO3)2(aq) 
D) Cl-(aq)+ Ag+(aq)→ AgCl(s) 
E) none of the above 
A) Mg2+(aq)+ 2Cl-(aq)+ 2Ag+(aq)+ 2NO3- (aq)→ Mg2+(aq)+ 2NO3-aq)+ 2AgCl(s) 
B) Mg2+(aq)+ 2Cl-(aq)+ 2Ag+(aq)+ 2NO3- (aq)→ Mg(NO3)2 (aq)+ 2 AgCl(s) 
C) Mg2+(aq)+ 2NO3-(aq)→ Mg(NO3)2(aq) 
D) Cl-(aq)+ Ag+(aq)→ AgCl(s) 
E) none of the above

Question 11

A reaction which forms a solid product is an example of a(n):

Accepted Answer

A) oxidation-reduction reaction. 
B) combustion reaction. 
C) precipitation reaction. 
D) gas evolution reaction. 
E) none of the above 
A) oxidation-reduction reaction. 
B) combustion reaction. 
C) precipitation reaction. 
D) gas evolution reaction. 
E) none of the above

Question 12

The following equation IS balanced: 2 C4H10O + 13 O2 → 8 CO2 + 10 H2O

Accepted Answer

A) True 
 B)False

Question 13

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

Accepted Answer

A) precipitation 
B) acid-base neutralization 
C) oxidation-reduction 
D) gas evolution 
E) no reaction 
A) precipitation 
B) acid-base neutralization 
C) oxidation-reduction 
D) gas evolution 
E) no reaction

Question 14

In writing the chemical equation for a precipitation reaction,what abbreviation of the physical state must appear with one of the products?

Accepted Answer

A) (s) 
B) (g) 
C) (l) 
D) (w) 
E) none of the above 
A) (s) 
B) (g) 
C) (l) 
D) (w) 
E) none of the above

Question 15

Which of the following equations is NOT balanced properly?

Accepted Answer

A) 2Cr + 6HCl → 2CrCl3 + 3H2 
B) 2NaHCO3 → Na2CO3 + CO2 + H2O 
C) Cr2(SO4)3 + 6KOH → 2Cr(OH)3 + 3 K2SO4 
D) 4NH3 + 14O2 → 4NO2 + 6H2O 
E) none of the above 
A) 2Cr + 6HCl → 2CrCl3 + 3H2 
B) 2NaHCO3 → Na2CO3 + CO2 + H2O 
C) Cr2(SO4)3 + 6KOH → 2Cr(OH)3 + 3 K2SO4 
D) 4NH3 + 14O2 → 4NO2 + 6H2O 
E) none of the above

Question 16

The following reaction IS balanced: AgNO3 + 2NH4Cl → AgCl + (NH4)2NO3

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is NOT evidence that a chemical reaction has occurred?

Accepted Answer

A) color change when chemicals are contacted with each other 
B) solid formation when chemicals are contacted with each other 
C) gas formation when chemicals are contacted with each other 
D) emission of light when chemicals are contact with each other 
E) All of the above are evidence of a chemical reaction. 
A) color change when chemicals are contacted with each other 
B) solid formation when chemicals are contacted with each other 
C) gas formation when chemicals are contacted with each other 
D) emission of light when chemicals are contact with each other 
E) All of the above are evidence of a chemical reaction.

Question 18

If you had an aqueous mixture that contained Ag+,K+,and Pb2+ cations,how many different solids could precipitate if a chloride solution was added?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) no solids will precipitate 
A) 1 
B) 2 
C) 3 
D) 4 
E) no solids will precipitate

Question 19

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

Accepted Answer

A) precipitation 
B) acid-base neutralization 
C) oxidation-reduction 
D) gas evolution 
E) no reaction 
A) precipitation 
B) acid-base neutralization 
C) oxidation-reduction 
D) gas evolution 
E) no reaction

Question 20

An aqueous solution is:

Accepted Answer

A) any liquid with another compound dissolved in it. 
B) an ionic compound with water dissolved in it. 
C) water with a molecular compound dissolved in it. 
D) water with another compound dissolved in it. 
E) none of the above 
A) any liquid with another compound dissolved in it. 
B) an ionic compound with water dissolved in it. 
C) water with a molecular compound dissolved in it. 
D) water with another compound dissolved in it. 
E) none of the above

One of the characteristics of an acid-base reaction is that this type of reaction forms water.

Before a chemical equation can be written,one must know:

What would be the formula of the precipitate that forms when Pb(NO₃)₂ (aq)and K₂SO₄ (aq)are mixed?

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) What is the correct net ionic equation?

Methane gas (CH₄),on complete combustion in air,produces: 1.CO₂ 2.H₂ 3.H₂O

Which of the following statements about balancing reactions is FALSE?

What are the coefficients for the following reaction when it is properly balanced? _potassium iodide + _lead (II)acetate → _lead (II)iodide +_potassium acetate

The net ionic equation for the reaction of sodium hydroxide plus hydrochloric acid is .

All of the following compounds are soluble in water EXCEPT:

When a solution of MgCl₂ and one of AgNO₃ are mixed,the net ionic equation is:

A reaction which forms a solid product is an example of a(n):

The following equation IS balanced: 2 C₄H₁₀O + 13 O₂ → 8 CO2 + 10 H₂O

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

In writing the chemical equation for a precipitation reaction,what abbreviation of the physical state must appear with one of the products?

Which of the following equations is NOT balanced properly?

The following reaction IS balanced: AgNO₃ + 2NH₄Cl → AgCl + (NH₄)₂NO₃

Which of the following is NOT evidence that a chemical reaction has occurred?

If you had an aqueous mixture that contained Ag⁺,K⁺,and Pb²⁺ cations,how many different solids could precipitate if a chloride solution was added?

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

An aqueous solution is:

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Exam 7: Chemical Reactions

One of the characteristics of an acid-base reaction is that this type of reaction forms water.

Before a chemical equation can be written,one must know:

What would be the formula of the precipitate that forms when Pb(NO3)2 (aq)and K2SO4 (aq)are mixed?

Considering the following precipitation reaction: Pb(NO3)2(aq)+ 2KI(aq)→ PbI2(s)+ 2KNO3(aq) What is the correct net ionic equation?

Methane gas (CH4),on complete combustion in air,produces: 1.CO2 2.H2 3.H2O

Which of the following statements about balancing reactions is FALSE?

What are the coefficients for the following reaction when it is properly balanced? ___potassium iodide + ___lead (II)acetate → ___lead (II)iodide +___potassium acetate

The net ionic equation for the reaction of sodium hydroxide plus hydrochloric acid is .

All of the following compounds are soluble in water EXCEPT:

When a solution of MgCl2 and one of AgNO3 are mixed,the net ionic equation is:

A reaction which forms a solid product is an example of a(n):

The following equation IS balanced: 2 C4H10O + 13 O2 → 8 CO2 + 10 H2O

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution?

In writing the chemical equation for a precipitation reaction,what abbreviation of the physical state must appear with one of the products?

Which of the following equations is NOT balanced properly?

The following reaction IS balanced: AgNO3 + 2NH4Cl → AgCl + (NH4)2NO3

Which of the following is NOT evidence that a chemical reaction has occurred?

If you had an aqueous mixture that contained Ag+,K+,and Pb2+ cations,how many different solids could precipitate if a chloride solution was added?

What type of a reaction occurs when a sodium hydroxide solution is mixed with an acetic acid solution?

An aqueous solution is:

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

What would be the formula of the precipitate that forms when Pb(NO₃)₂ (aq)and K₂SO₄ (aq)are mixed?

Considering the following precipitation reaction: Pb(NO₃)₂(aq)+ 2KI(aq)→ PbI₂(s)+ 2KNO₃(aq) What is the correct net ionic equation?

Methane gas (CH₄),on complete combustion in air,produces: 1.CO₂ 2.H₂ 3.H₂O

What are the coefficients for the following reaction when it is properly balanced? _potassium iodide + _lead (II)acetate → _lead (II)iodide +_potassium acetate

When a solution of MgCl₂ and one of AgNO₃ are mixed,the net ionic equation is:

The following equation IS balanced: 2 C₄H₁₀O + 13 O₂ → 8 CO2 + 10 H₂O

The following reaction IS balanced: AgNO₃ + 2NH₄Cl → AgCl + (NH₄)₂NO₃

If you had an aqueous mixture that contained Ag⁺,K⁺,and Pb²⁺ cations,how many different solids could precipitate if a chloride solution was added?