Question 1

In which reaction does the oxidation number of hydrogen change?

Accepted Answer

A)  HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l) 
B)  2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g) 
C)  CaO (s) + H2O (l) → Ca(OH) 2 (s) 
D)  2HClO4 (aq) + CaCO3 (s) → Ca(ClO4) 2 (aq) + H2O (l) + CO2 (g) 
E)  SO2 (g) + H2O (l) → H2SO3 (aq)  B

Question 2

Which of the following are weak electrolytes?
HNO3
HF
NH3
LiBr

Accepted Answer

A)  HNO3, LiBr
B)  HNO3, HF, NH3, LiBr
C)  HF, LiBr
D)  HF, NH3
E)  HNO3, NH3, LiBr D

Question 3

What is the concentration (M)of 39.88 mL of an unknown NaOH solution if it required  of  to neutralize?

Accepted Answer

A)  0.7617
B)  2788
C)  1211
D)  1.313
E)  1.211 A

Question 4

Mixing 1.00 mL of an aqueous solution with 9.00 mL of water represents a ________.

Accepted Answer

A)  twofold dilution
B)  tenfold dilution
C)  titration
D)  hundredfold dilution
E)  neutralization

Question 5

The solvent in an aqueous solution is ________.

Accepted Answer

The answer of The solvent in an aqueous solution is...

Question 6

The net ionic equation for formation of an aqueous solution of NiI2 accompanied by evolution of CO2 gas via mixing solid NiCO3 and aqueous hydriodic acid is ________.

Accepted Answer

A)  2NiCO3 (s) + HI (aq) → 2H2O (l) + CO2 (g) + 2Ni2+ (aq) 
B)  NiCO3 (s) + I- (aq) → 2H2O (l) + CO2 (g) + Ni2+ (aq) + HI (aq) 
C)  NiCO3 (s) + 2H+ (aq) → H2O (l) + CO2 (g) + Ni2+ (aq) 
D)  NiCO3 (s) + 2HI (aq) → 2H2O (l) + CO2 (g) + NiI2 (aq) 
E)  NiCO3 (s) + 2HI (aq) → H2O (l) + CO2 (g) + Ni2+ (aq) + 2I- (aq)

Question 7

What volume (mL)of 7.48 × 10-2 M perchloric acid can be neutralized with 115 mL of 0.244 M sodium hydroxide?

Accepted Answer

A)  125
B)  8.60
C)  188
D)  750
E)  375

Question 8

A titration reached the equivalence point when 16.1 mL of  was added to  of NaOH (aq)of unknown concentration.What is the concentration (M)of this unknown NaOH solution?

Accepted Answer

A)  0.561
B)  80.8
C)  0.280
D)  0.140
E)  3.21

Question 9

How many moles of CaCl₂ are formed in the neutralization of 138 mL of 0.352 M Ca(OH)₂ with aqueous HCl?

Accepted Answer

The answer of How many moles of CaCl₂ are formed...

Question 10

How many moles of Na+ are present in 343 mL of a 1.27 M solution of Na2SO4?

Accepted Answer

A)  0.436
B)  0.871
C)  1.31
D)  3.70
E)  7.40

Question 11

How many grams of H3PO4 are in 145 mL of a 3.50 M solution of H3PO4?

Accepted Answer

A)  0.508
B)  49.7
C)  20.0
D)  4.90
E)  612

Question 12

Which hydroxides are weak bases?

Accepted Answer

A)  KOH
B)  Ba(OH) 2
C)  RbOH
D)  CsOH
E)  None of these choices are weak bases.

Question 13

What are the spectator ions in the reaction between KOH (aq)and HNO3 (aq)?

Accepted Answer

A)  K+ and H+
B)  H+ and OH-
C)  K+ and NO3-
D)  H+ and NO3-
E)  OH- only

Question 14

How many moles of Cu²⁺ ions are present in 0.100 L of a 0.100 M solution of CuCl₂?

Accepted Answer

The answer of How many moles of Cu²⁺ ions are...

Question 15

How many grams of H3PO4 are in 175 mL of a 4.00 M solution of H3PO4?

Accepted Answer

A)  0.700
B)  20.0
C)  68.6
D)  4.90
E)  612

Question 16

What is the molarity of iodide ion in a solution prepared by mixing 20.0 mL of 0.100 M HI and 5.00 mL of 0.200 M KI?

Accepted Answer

A)  0.180
B)  8.33
C)  0.120
D)  1.50
E)  0.0400

Question 17

Of the following elements,________ is the most easily oxidized. lithium
Zinc
Hydrogen
Aluminum
Gold

Accepted Answer

A)  aluminum
B)  zinc
C)  hydrogen
D)  lithium
E)  gold

Question 18

Combining aqueous solutions of BaI2 and Na2SO4 affords a precipitate of BaSO4.Which ions are spectator ions in the reaction?

Accepted Answer

A)  Ba2+ only
B)  Na+ only
C)  Ba2+ and SO42-
D)  Na+ and I-
E)  SO42- and I-

Question 19

Which species is oxidized in the reaction below?
Au(s)+ 3NO3-(aq)+ 6H+(aq)→ Au3+(aq)+ NO(g)+ 3H2O (l)
H+
N+5
O2-
H2O
Au

Accepted Answer

A)  H+
B)  N+5
C)  Au
D)  O2-
E)  H2O

Question 20

A 17.5 mL sample of an acetic acid (CH3CO2H)solution required 29.6 mL of 0.250 M NaOH for neutralization.The concentration of acetic acid was ________ M.

Accepted Answer

A)  0.296
B)  0.423
C)  0.591
D)  0.105
E)  129.5

Exam 4: Reactions in Aqueous Solution

In which reaction does the oxidation number of hydrogen change?

Which of the following are weak electrolytes? HNO₃ HF NH₃ LiBr

What is the concentration (M) of 39.88 mL of an unknown NaOH solution if it required of to neutralize?

Mixing 1.00 mL of an aqueous solution with 9.00 mL of water represents a ________.

The solvent in an aqueous solution is ________.

The net ionic equation for formation of an aqueous solution of NiI₂ accompanied by evolution of CO₂ gas via mixing solid NiCO₃ and aqueous hydriodic acid is ________.

What volume (mL) of 7.48 × 10^-2 M perchloric acid can be neutralized with 115 mL of 0.244 M sodium hydroxide?

A titration reached the equivalence point when 16.1 mL of was added to of NaOH (aq) of unknown concentration.What is the concentration (M) of this unknown NaOH solution?

How many moles of CaCl₂ are formed in the neutralization of 138 mL of 0.352 M Ca(OH)₂ with aqueous HCl?

How many moles of Na⁺ are present in 343 mL of a 1.27 M solution of Na₂SO₄?

How many grams of H₃PO₄ are in 145 mL of a 3.50 M solution of H₃PO₄?

Which hydroxides are weak bases?

What are the spectator ions in the reaction between KOH (aq) and HNO₃(aq) ?

How many moles of Cu²⁺ ions are present in 0.100 L of a 0.100 M solution of CuCl₂?

How many grams of H₃PO₄ are in 175 mL of a 4.00 M solution of H₃PO₄?

What is the molarity of iodide ion in a solution prepared by mixing 20.0 mL of 0.100 M HI and 5.00 mL of 0.200 M KI?

Of the following elements,________ is the most easily oxidized. lithium Zinc Hydrogen Aluminum Gold

Combining aqueous solutions of BaI₂ and Na₂SO₄affords a precipitate of BaSO₄.Which ions are spectator ions in the reaction?

Which species is oxidized in the reaction below? Au(s) + 3NO₃^-(aq) + 6H⁺(aq) → Au³⁺(aq) + NO(g) + 3H₂O (l) H⁺ N⁺⁵ O^2- H₂O Au

A 17.5 mL sample of an acetic acid (CH₃CO₂H) solution required 29.6 mL of 0.250 M NaOH for neutralization.The concentration of acetic acid was ________ M.

Exam 4: Reactions in Aqueous Solution

In which reaction does the oxidation number of hydrogen change?

Which of the following are weak electrolytes? HNO3 HF NH3 LiBr

What is the concentration (M) of 39.88 mL of an unknown NaOH solution if it required of to neutralize?

Mixing 1.00 mL of an aqueous solution with 9.00 mL of water represents a ________.

The solvent in an aqueous solution is ________.

The net ionic equation for formation of an aqueous solution of NiI2 accompanied by evolution of CO2 gas via mixing solid NiCO3 and aqueous hydriodic acid is ________.

What volume (mL) of 7.48 × 10-2 M perchloric acid can be neutralized with 115 mL of 0.244 M sodium hydroxide?

A titration reached the equivalence point when 16.1 mL of was added to of NaOH (aq) of unknown concentration.What is the concentration (M) of this unknown NaOH solution?

How many moles of CaCl2 are formed in the neutralization of 138 mL of 0.352 M Ca(OH)2 with aqueous HCl?

How many moles of Na+ are present in 343 mL of a 1.27 M solution of Na2SO4?

How many grams of H3PO4 are in 145 mL of a 3.50 M solution of H3PO4?

Which hydroxides are weak bases?

What are the spectator ions in the reaction between KOH (aq) and HNO3 (aq) ?

How many moles of Cu2+ ions are present in 0.100 L of a 0.100 M solution of CuCl2?

How many grams of H3PO4 are in 175 mL of a 4.00 M solution of H3PO4?

What is the molarity of iodide ion in a solution prepared by mixing 20.0 mL of 0.100 M HI and 5.00 mL of 0.200 M KI?

Of the following elements,________ is the most easily oxidized. lithium Zinc Hydrogen Aluminum Gold

Combining aqueous solutions of BaI2 and Na2SO4 affords a precipitate of BaSO4.Which ions are spectator ions in the reaction?

Which species is oxidized in the reaction below? Au(s) + 3NO3-(aq) + 6H+(aq) → Au3+(aq) + NO(g) + 3H2O (l) H+ N+5 O2- H2O Au

A 17.5 mL sample of an acetic acid (CH3CO2H) solution required 29.6 mL of 0.250 M NaOH for neutralization.The concentration of acetic acid was ________ M.

Which of the following are weak electrolytes? HNO₃ HF NH₃ LiBr

The net ionic equation for formation of an aqueous solution of NiI₂ accompanied by evolution of CO₂ gas via mixing solid NiCO₃ and aqueous hydriodic acid is ________.

What volume (mL) of 7.48 × 10^-2 M perchloric acid can be neutralized with 115 mL of 0.244 M sodium hydroxide?

How many moles of CaCl₂ are formed in the neutralization of 138 mL of 0.352 M Ca(OH)₂ with aqueous HCl?

How many moles of Na⁺ are present in 343 mL of a 1.27 M solution of Na₂SO₄?

How many grams of H₃PO₄ are in 145 mL of a 3.50 M solution of H₃PO₄?

What are the spectator ions in the reaction between KOH (aq) and HNO₃(aq) ?

How many moles of Cu²⁺ ions are present in 0.100 L of a 0.100 M solution of CuCl₂?

How many grams of H₃PO₄ are in 175 mL of a 4.00 M solution of H₃PO₄?

Combining aqueous solutions of BaI₂ and Na₂SO₄affords a precipitate of BaSO₄.Which ions are spectator ions in the reaction?

Which species is oxidized in the reaction below? Au(s) + 3NO₃^-(aq) + 6H⁺(aq) → Au³⁺(aq) + NO(g) + 3H₂O (l) H⁺ N⁺⁵ O^2- H₂O Au

A 17.5 mL sample of an acetic acid (CH₃CO₂H) solution required 29.6 mL of 0.250 M NaOH for neutralization.The concentration of acetic acid was ________ M.