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    Topic: Neutralization And Titration

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    Neutralization And Titration
    1

    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)

    2

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

    (1) combustion

    (2) decomposition

    (3) fermentation

    (4) neutralization

    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

    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

    5

    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)

    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

    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

    Base your answers to questions 8 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.

    8

    The volume of the NaOH(aq) solution is expressed to what number of significant figures?

    Allow 1 credit for 3 or three.

    Base your answers to questions 9 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).

    9

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

    acids-bases-and-salts, neutralization-and-titration fig: chem12014-abkq63.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 10 on the information below and on your knowledge of chemistry.

    A NaOH(aq) solution and an acid-base indicator are used to determine the molarity of an HCl(aq) solution. A 25.0-milliliter sample of the HCl(aq) is exactly neutralized by 15.0 milliliters of 0.20 M NaOH(aq).

    10

    Complete the equation below for the neutralization reaction that occurs, by writing a formula for each product.

    acids-bases-and-salts, neutralization-and-titration, moles-and-stoichiometry, formulas, moles-and-stoichiometry, compounds fig: chem12016-abkq63.png

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

    • chem12016-rg_g4.png

    Base your answers to questions 11 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).

    11

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

    acids-bases-and-salts, neutralization-and-titration fig: chem62012-abkq63.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 12 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.

    12

    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 13 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)

    13

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

    acids-bases-and-salts, neutralization-and-titration fig: chem82015-abkq81.png

    Allow 1 credit for MgCl2(aq).

    Base your answers to questions 14 on the information below and on your knowledge of chemistry.

    In a laboratory activity, a student measures the pH values of four household liquids and distilled water, as shown in the table below. During this laboratory activity, appropriate safety equipment is used and safety procedures are followed.

    acids-bases-and-salts, acidity-ph-and-indicators fig: chem62023-exam_g24.png

    14

    Complete the equation below by writing the formula of the missing product in the reaction of aqueous potassium hydroxide with the vinegar, acetic acid. [1]

    acids-bases-and-salts, neutralization-and-titration fig: chem62023-ansbklt_abkq1.png

    Allow 1 credit for H2O or HOH.

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

    In a titration using a pH meter, 16.0 milliliters of 0.18 M NaOH(aq) exactly neutralizes a 24.0-milliliter sample of HCl(aq) in a flask. During this laboratory activity, appropriate safety equipment was used and safety procedures were followed.

    15

    Complete the equation below for the neutralization reaction by writing a formula for each product. [1]

    acids-bases-and-salts, neutralization-and-titration fig: chem62022-answerbooklet_abkq1.png

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

    • NaCl(aq) + H2O(ℓ)

    • HOH + NaCl