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    Topic: Neutralization And Titration

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    Neutralization And Titration
    1

    In a neutralization reaction, an aqueous solution of an Arrhenius acid reacts with an aqueous solution of an Arrhenius base to produce

    (1) an ether and water

    (2) an ether and an alcohol

    (3) a salt and water

    (4) a salt and an alcohol

    2

    Which equation represents a neutralization reaction?

    (1) 6HClO → 4HCl + 2HClO3

    (2) CH4 + 2O2 → CO2 + 2H2O

    (3) Ca(OH)2 + H2SO4 → CaSO4 + 2H2O

    (4) Ba(OH)2 + Cu(NO3)2 → Ba(NO3)2 + Cu(OH)2

    3

    Which type of reaction occurs when an Arrhenius acid reacts with an Arrhenius base to form a salt and water?

    (1) combustion

    (2) decomposition

    (3) neutralization

    (4) saponification

    4

    Which equation represents neutralization?

    (1) 6Li(s) + N2(g) → 2Li3N(s)

    (2) 2Mg(s) + O2(g) → 2MgO(s)

    (3) 2KOH(aq) + H2SO4(aq) → K2SO4(aq) + 2H2O(ℓ)

    (4) Pb(NO3)2(aq) + K2CrO4(aq) → 2KNO3(aq) + PbCrO4(s)

    5

    Which type of reaction occurs when H+(aq) reacts with OH−(aq)?

    (1) combustion

    (2) decomposition

    (3) fermentation

    (4) neutralization

    6

    Which acid and base react to form water and sodium sulfate?

    (1) sulfuric acid and sodium hydroxide

    (2) sulfuric acid and potassium hydroxide

    (3) sulfurous acid and sodium hydroxide

    (4) sulfurous acid and potassium hydroxide

    7

    The reaction of an Arrhenius acid with an Arrhenius base produces water and

    (1) a salt

    (2) an ester

    (3) an aldehyde

    (4) a halocarbon

    8

    What are the products when potassium hydroxide reacts with hydrochloric acid?

    (1) KH(s), Cl+(aq), and OH−(aq)

    (2) K(s), Cl2(g), and H2O(ℓ)

    (3) KCl(aq) and H2O(ℓ)

    (4) KOH(aq) and Cl2(g)

    9

    In a titration, 10.0 mL of 0.0750 M HCl(aq) is exactly neutralized by 30.0 mL of KOH(aq) of unknown concentration. What

    is the concentration of the KOH(aq) solution?

    (1) 0.0250 M

    (2) 0.0750 M

    (3) 0.225 M

    (4) 0.333 M

    Base your answers to questions 10 on the information below and on your knowledge of chemistry.

    The gastric juice of the human stomach has a pH value of approximately 1.5. Hydrochloric acid in the gastric juice is necessary for the digestion process. However, excess hydrochloric acid may harm the stomach lining. One type of antacid uses Mg(OH)2(s) to neutralize excess hydrochloric acid in the stomach. This neutralization is represented by the incomplete equation below.

    Mg(OH)2(s) + 2HCl(aq) → ___ (aq) + 2H2O(ℓ)

    10

    Complete the equation below by writing the formula of the missing product.

    neutralization-and-titration fig: chem82015-abkq81rd050.png

    Allow 1 credit for MgCl2(aq).

    Base your answers to questions 11 on the information below and on your knowledge of chemistry.

    During a laboratory activity, a student places 25.0 mL of HCl(aq) of unknown concentration into a flask. The student adds four drops of phenolphthalein to the solution in the flask. The solution is titrated with 0.150 M KOH(aq) until the solution appears faint pink. The volume of KOH(aq) added is 18.5 mL.

    11

    Complete the equation in your answer booklet for the neutralization reaction that occurs during the titration.

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • KCl(aq) + H2O(ℓ)

    • K+ + Cl− + OH2(ℓ)

    • HOH + ClK

    Base your answers to questions 12 on the information below and on your knowledge of chemistry.

    In a titration, 50.0 milliliters of 0.026 M HCl(aq) is neutralized by 38.5 milliliters of KOH(aq).

    12

    Complete the equation below for the neutralization by writing the formula of the missing product.

    neutralization-and-titration fig: chem12014-abkq63rd050.png

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • KCl

    • ClK

    • K+(aq) + Cl−(aq)

    • K+ + Cl−

    Base your answers to questions 13 on the information below.

    In a titration, 20.0 milliliters of 0.15 M HCl(aq) is exactly neutralized by 18.0 milliliters of KOH(aq).

    13

    Complete the equation below for the neutralization reaction by writing the formula of each product.

    neutralization-and-titration fig: chem62012-abkq63rd050.png

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • H2O(ℓ ) and KCl(aq)

    • KCl and HOH

    Base your answers to questions 14 on the information below.

    In a titration, a few drops of an indicator are added to a flask containing 35.0 milliliters of HNO3(aq) of unknown concentration. After 30.0 milliliters of 0.15 M NaOH(aq) solution is slowly added to the flask, the indicator changes color, showing the acid is neutralized.

    14

    Complete the equation for this neutralization reaction by writing the formula of each product.

    HNO3(aq) + NaOH(aq) → ____________________ + ____________________

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • NaNO3(aq) + H2O(ℓ )

    • HOH + NaNO3

    Base your answers to questions 15 on the information below and on your knowledge of chemistry.

    A NaOH(aq) solution with a pH value of 13 is used to determine the molarity of a HCl(aq) solution. A 10.0-mL sample of the HCl(aq) is exactly neutralized by 16.0 mL of 0.100 M NaOH(aq). During this laboratory activity, appropriate safety equipment was used and safety procedures were followed.

    15

    Determine the molarity of the HCl(aq) sample, using the titration data.

    Allow 1 credit for 0.160 M or .16 M.