Question 1

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? 
H2SO4(aq)  + 2NaOH(aq)   2H2O(l)  + Na2SO4(aq)

Accepted Answer

A)   0.045 L
B)   0.28 L
C)   0.56 L
D)   0.90 L
E)   1.1 LF) D) and E)
G) C) and D)

Question 2

A solution of methanol (CH4O) in water has a concentration of 0.200 M. What mass of methanol, in grams, is present in 0.150 liters of this solution?

Accepted Answer

Question 3

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, Co3(PO4) 2
B)   cobalt(III)  phosphate, Co3(PO4) 2
C)   cobalt(II)  phosphate, CoPO4
D)   cobalt(III)  phosphate, CoPO4
E)   ammonium sulfate, (NH4) 2SO4F) A) and B)
G) A) and C)

Question 4

In the following reaction, what ions, if any, are spectator ions? 
Pb(NO3) 2(aq)  + 2NaCl(aq)   PbCl2(s)  + 2NaNO3(aq)

Accepted Answer

A)   Pb2+(aq) , Cl-(aq) 
B)   Na+(aq) , NO3-(aq) 
C)   Pb2+(aq) , NO3-(aq) 
D)   Na+(aq) , Cl-(aq) 
E)   There are no spectator ions.F) D) and E)
G) C) and D)

Question 5

Calculate the oxidation number of sulfur in sodium metabisulfite, Na2S2O5.

Accepted Answer

A)   -2
B)   +2
C)   +4
D)   +5
E)   None of the above is the correct oxidation number.F) A) and E)
G) C) and D)

Question 6

Which of the following is a weak acid?

Accepted Answer

A)   H2SO4
B)   HNO3
C)   HF
D)   HBr
E)   HClF) A) and D)
G) C) and D)

Question 7

Select the classification for the following reaction. 
CaCl2H2O(s)  2H2O(s)    CaCl2(s)  + H2O(g)  A)  combination B)  decomposition C)  displacement D)  acid-base E)  precipitation" class="answers-bank-image d-inline" rel="preload" > CaCl2(s)  + H2O(g)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   precipitationF) A) and B)
G) All of the above

Question 8

In an acid-base (neutralization) reaction the indicator will change color at the end point.

Accepted Answer

A) True 
 B)False

Question 9

A 0.00100 mol sample of Ca(OH) 2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH) 2(s)  + 2HCl(aq)   CaCl2(aq)  + H2O(l)

Accepted Answer

A)   0.0200 M
B)   0.0400 M
C)   0.0800 M
D)   4.00 × 10-5 M
E)   none of the aboveF) A) and E)
G) A) and D)

Question 10

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 molF) B) and C)
G) A) and E)

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

Select the classification for the following reaction. Na2O(s)  + H2O(l)   2NaOH(aq)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   precipitationF) A) and B)
G) A) and C)

Question 13

Which one of the following ionic compounds is insoluble in water?

Accepted Answer

A)   Na3PO4
B)   AgNO3
C)   NaCl
D)   CaCO3
E)   MgCl2F) C) and D)
G) A) and E)

Question 14

What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

Accepted Answer

A)   H+ and OH-
B)   H+ and Rb+
C)   Rb+ and Br-
D)   Br- and OH-
E)   There are no spectator ions in this reaction.F) A) and B)
G) A) and C)

Question 15

Select the classification for the following reaction. H2(g)  + Cl2(g)   2HCl(g)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   none of the aboveF) B) and D)
G) All of the above

Question 16

An acid

Accepted Answer

A)   produces hydroxide ions when dissolved in water.
B)   changes the color of phenolphthalein indicator from colorless to pink.
C)   donates electrons in an electron transfer reaction.
D)   donates protons in a proton transfer reaction.
E)   does none of the above.F) D) and E)
G) B) and E)

Question 17

When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

Accepted Answer

A) True 
 B)False

Question 18

You are provided with a 250 mL volumetric flask, deionized water, and solid NaOH. How much NaOH should be weighed out in order to make 250. mL of 0.100 M solution?

Accepted Answer

The answer of You are provided with a 250 mL...

Question 19

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

Accepted Answer

A)   41.3 g
B)   31.9 g
C)   16.1 g
D)   8.77 g
E)   2.41 gF) C) and D)
G) B) and D)

Question 20

Potassium carbonate, K2CO3, sodium iodide, NaI, magnesium chloride, MgCl2, 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)   K2CO3
B)   NaI
C)   MgCl2
D)   CH3OH
E)   NH4ClF) B) and E)
G) A) and E)

Exam 4: The Major Classes of Chemical Reactions

Select the classification for the following reaction. CaCl2H2O(s) CaCl2(s) + H2O(g)

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An acid

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Which one of the following ionic compounds is insoluble in water?

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Potassium carbonate, K2CO3, sodium iodide, NaI, magnesium chloride, MgCl2, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

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A 0.00100 mol sample of Ca(OH) 2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH) 2(s) + 2HCl(aq)  CaCl2(aq) + H2O(l)

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A solution of methanol (CH4O) in water has a concentration of 0.200 M. What mass of methanol, in grams, is present in 0.150 liters of this solution?

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A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

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In an acid-base (neutralization) reaction the indicator will change color at the end point.

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Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H2SO4(aq) + 2NaOH(aq)  2H2O(l) + Na2SO4(aq)

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Select the classification for the following reaction. Na2O(s) + H2O(l)  2NaOH(aq)

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When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

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

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What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

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

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In the following reaction, what ions, if any, are spectator ions? Pb(NO3) 2(aq) + 2NaCl(aq)  PbCl2(s) + 2NaNO3(aq)

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You are provided with a 250 mL volumetric flask, deionized water, and solid NaOH. How much NaOH should be weighed out in order to make 250. mL of 0.100 M solution?

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Calculate the oxidation number of sulfur in sodium metabisulfite, Na2S2O5.

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Select the classification for the following reaction. H2(g) + Cl2(g)  2HCl(g)

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

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Which of the following is a weak acid?

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Select the classification for the following reaction. CaCl₂H₂O(s) CaCl₂(s) + H₂O(g)

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Potassium carbonate, K₂CO₃, sodium iodide, NaI, magnesium chloride, MgCl₂, methanol, CH₃OH, and ammonium chloride, NH₄Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

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A 0.00100 mol sample of Ca(OH) ₂ requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH) ₂(s) + 2HCl(aq)  CaCl₂(aq) + H₂O(l)

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A solution of methanol (CH₄O) in water has a concentration of 0.200 M. What mass of methanol, in grams, is present in 0.150 liters of this solution?

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Automobile batteries use 3.0 M H₂SO₄as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H₂SO₄(aq) + 2NaOH(aq)  2H₂O(l) + Na₂SO₄(aq)

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Select the classification for the following reaction. Na₂O(s) + H₂O(l)  2NaOH(aq)

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

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In the following reaction, what ions, if any, are spectator ions? Pb(NO₃) ₂(aq) + 2NaCl(aq)  PbCl₂(s) + 2NaNO₃(aq)

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Calculate the oxidation number of sulfur in sodium metabisulfite, Na₂S₂O₅.

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Select the classification for the following reaction. H₂(g) + Cl₂(g)  2HCl(g)

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

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