Question 1

A student prepared a stock solution by dissolving 10.0 g of KOH in enough water to make 150.mL of solution.She then took 15.0 mL of the stock solution and diluted it with enough water to make water to make 65.0 mL of a final solution.What is the concentration of KOH for the final solution?

Accepted Answer

A)  0.274 M
B)  0.356 M
C)  2.81 M
D)  3.65 M

Question 2

When 280.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.

Question 3

How many milliliters of 0.550 M hydriodic acid are needed to react with 15.00 mL of 0.217 M CsOH?
HI(aq) + CsOH(aq) → CsI(aq) + H2O(l)

Accepted Answer

A)  0.0263 mL
B)  0.169 mL
C)  5.92 mL
D)  38.0 mL

Question 4

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K2S and Fe(NO3) 2 are mixed.

Accepted Answer

A)  K+(aq) + NO3-(aq) → KNO3(s) 
B)  Fe2+(aq) + S2-(aq) + 2 K+(aq) + 2 NO3-(aq) → FeS(s) + 2 K+(aq) + 2 NO3-(aq) 
C)  Fe2+(aq) + S2-(aq) + 2 K+(aq) + 2 NO3-(aq) → Fe2+(aq) + S2-(aq) + 2 KNO3(s) 
D)  Fe2+(aq) + S2-(aq) → FeS(s) 
E)  No reaction occurs.

Question 5

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

Accepted Answer

Question 6

HCl ,HI ,H2SO4,LiCl ,and KI are all classified as

Accepted Answer

A)  acids.
B)  nonelectrolytes.
C)  strong electrolytes.
D)  weak electrolytes.

Question 7

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

Accepted Answer

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

Question 8

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements:
2NaN3(s) → 2Na(s) + 3N2(g) 
How many moles of N2 are produced by the decomposition of 2.88 mol of sodium azide?

Accepted Answer

A)  1.92
B)  8.64
C)  4.32
D)  0.960
E)  1.44

Question 9

Which one of the following compounds is insoluble in water?

Accepted Answer

A)  Ca Cl2
B)  NaNO3
C)  Pb Cl2
D)  K2CO3

Question 10

Determine the molarity of a solution formed by dissolving 468 mg of MgI2 in enough water to yield 50.0 mL of solution.

Accepted Answer

A)  0.0297 M
B)  0.0337 M
C)  0.0936 M
D)  0.0107 M
E)  0.0651 M

Question 11

Which pair of compounds is soluble in water?

Accepted Answer

A)  Ag Cl and AgBr 
B)  CoS and K2S
C)  NaI and Cu(NO3) 2
D)  NH4NO3 and BaCO3

Question 12

Identify the spectator ions in the following molecular equation.
KBr(aq) + AgNO3(aq) → AgBr(s) + KNO3(aq)

Accepted Answer

A)  Ag+ & Br-
B)  K+ & NO3-
C)  K+ & Br-
D)  Ag+ & NO3-
E)  There are no spectator ions in this reaction.

Question 13

What causes a precipitation reaction to occur between two soluble compounds?

Accepted Answer

A precipitate,or insoluble com...

Question 14

1.06g of Na2CO3 is dissolved in 100mL of water.What is the molarity of Na+ ions in the solution?

Accepted Answer

A)  0.2 M
B)  0.1 M
C)  1 × 10-4 M
D)  0.01 M

Question 15

What are the spectator ions for the following reaction in aqueous solution:
AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)

Accepted Answer

A)  Ag+
B)  Cl-
C)  Na+ & NO3-
D)  Na+ & Cl-

Question 16

Which of the following is an oxidation-reduction reaction?

Accepted Answer

A)  HCl(aq) + LiOH(aq) → LiCl(aq) + H2O(l) 
B)  NaI(aq) + AgNO3(aq) → AgI(s) + NaNO3(aq) 
C)  Pb(C2H3O2) 2(aq) + 2 NaCl(aq) → PbCl2(s) + 2 NaC2H3O2(aq) 
D)  Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) 
E)  All of the above are oxidation-reduction reactions.

Question 17

Determine the number of grams H2 formed when 250.0 mL of 0.743 M HCl solution reacts with
3.41 × 1023 atoms of Fe according to the following reaction.
2 HCl(aq) + Fe(s) → H2(g) + FeCl2(aq)

Accepted Answer

A)  0.374 g
B)  1.33 g
C)  1.14 g
D)  0.187 g
E)  1.51 g

Question 18

Based on the balanced chemical equation shown below,what volume of 0.250 M K2S2O3(aq) ,is needed to completely react with 24.88 mL of 0.125 M KI3(aq) ,according to the chemical equation:
2 S2O32-(aq) + I3-(aq) → S4O62-(aq) + 3 I-(aq) .

Accepted Answer

A)  6.22 mL
B)  12.4 mL
C)  24.9 mL
D)  99.5 mL

Question 19

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 20

What is the oxidation number of the oxygen atom in Rb2O2?

Accepted Answer

A)  -2
B)  -1
C)  +1
D)  +2

Exam 4: Chemical Quantities and Aqueous Reactions

When 280.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

Correct AnswerverifiedShow Answer

Determine the molarity of a solution formed by dissolving 468 mg of MgI2 in enough water to yield 50.0 mL of solution.

Correct AnswerverifiedShow Answer

Which one of the following compounds is insoluble in water?

Correct AnswerverifiedShow Answer

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2NaN3(s) → 2Na(s) + 3N2(g) How many moles of N2 are produced by the decomposition of 2.88 mol of sodium azide?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Based on the balanced chemical equation shown below,what volume of 0.250 M K2S2O3(aq) ,is needed to completely react with 24.88 mL of 0.125 M KI3(aq) ,according to the chemical equation: 2 S2O32-(aq) + I3-(aq) → S4O62-(aq) + 3 I-(aq) .

Correct AnswerverifiedShow Answer

1.06g of Na2CO3 is dissolved in 100mL of water.What is the molarity of Na+ ions in the solution?

Correct AnswerverifiedShow Answer

A student prepared a stock solution by dissolving 10.0 g of KOH in enough water to make 150.mL of solution.She then took 15.0 mL of the stock solution and diluted it with enough water to make water to make 65.0 mL of a final solution.What is the concentration of KOH for the final solution?

Correct AnswerverifiedShow Answer

Which of the following is an oxidation-reduction reaction?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

What is the oxidation number of the oxygen atom in Rb2O2?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which pair of compounds is soluble in water?

Correct AnswerverifiedShow Answer

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K2S and Fe(NO3) 2 are mixed.

Correct AnswerverifiedShow Answer

HCl ,HI ,H2SO4,LiCl ,and KI are all classified as

Correct AnswerverifiedShow Answer

Identify the spectator ions in the following molecular equation. KBr(aq) + AgNO3(aq) → AgBr(s) + KNO3(aq)

Correct AnswerverifiedShow Answer

What are the spectator ions for the following reaction in aqueous solution: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)

Correct AnswerverifiedShow Answer

Determine the number of grams H2 formed when 250.0 mL of 0.743 M HCl solution reacts with 3.41 × 1023 atoms of Fe according to the following reaction. 2 HCl(aq) + Fe(s) → H2(g) + FeCl2(aq)

Correct AnswerverifiedShow Answer

What causes a precipitation reaction to occur between two soluble compounds?

Correct AnswerverifiedA precipitate,or insoluble com...View AnswerShow Answer

How many milliliters of 0.550 M hydriodic acid are needed to react with 15.00 mL of 0.217 M CsOH? HI(aq) + CsOH(aq) → CsI(aq) + H2O(l)

Correct AnswerverifiedShow Answer

When 280.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

Correct Answer
verified

Determine the molarity of a solution formed by dissolving 468 mg of MgI₂ in enough water to yield 50.0 mL of solution.

Correct Answer
verified

Correct Answer
verified

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 2NaN₃(s) → 2Na(s) + 3N₂(g) How many moles of N₂ are produced by the decomposition of 2.88 mol of sodium azide?

Correct Answer
verified

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

Correct Answer
verified

Based on the balanced chemical equation shown below,what volume of 0.250 M K₂S₂O₃(aq) ,is needed to completely react with 24.88 mL of 0.125 M KI₃(aq) ,according to the chemical equation: 2 S₂O₃^2-(aq) + I₃^-(aq) → S₄O₆^2-(aq) + 3 I^-(aq) .

Correct Answer
verified

1.06g of Na₂CO₃ is dissolved in 100mL of water.What is the molarity of Na⁺ions in the solution?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the oxidation number of the oxygen atom in Rb₂O₂?

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K₂S and Fe(NO₃) ₂ are mixed.

Correct Answer
verified

HCl,HI,H₂SO₄,LiCl,and KIare all classified as

Correct Answer
verified

Identify the spectator ions in the following molecular equation. KBr(aq) + AgNO₃(aq) → AgBr(s) + KNO₃(aq)

Correct Answer
verified

What are the spectator ions for the following reaction in aqueous solution: AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

Correct Answer
verified

Determine the number of grams H₂ formed when 250.0 mL of 0.743 M HCl solution reacts with 3.41 × 10²³ atoms of Fe according to the following reaction. 2 HCl(aq) + Fe(s) → H₂(g) + FeCl₂(aq)

Correct Answer
verified

Correct Answer
verified
A precipitate,or insoluble com...
View Answer

How many milliliters of 0.550 M hydriodic acid are needed to react with 15.00 mL of 0.217 M CsOH? HI(aq) + CsOH(aq) → CsI(aq) + H₂O(l)

Correct Answer
verified