Regents Chemistry Test Preparation Practice

    Arrhenius Acids And Bases

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    Base your answers to questions 11 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.

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

    In a laboratory activity, a student titrates a 20.0-milliliter sample of HCl(aq) using 0.025 M NaOH(aq). In one of the titration trials, 17.6 milliliters of the base solution exactly neutralizes the acid sample.

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    Base your answers to questions 13 on the information below and on your knowledge of chemistry.

    A student is to determine the concentration of an NaOH(aq) solution by performing two different titrations. In a first titration, the student titrates 25.0 mL of 0.100 M H2SO4(aq) with NaOH(aq) of unknown concentration.

    In a second titration, the student titrates 25.0 mL of 0.100 M HCl(aq) with a sample of the NaOH(aq). During this second titration, the volume of the NaOH(aq) added and the corresponding pH value of the reaction mixture is measured. The graph below represents the relationship between pH and the volume of the NaOH(aq) added for this second titration.

    arrhenius-acids-and-bases fig: chem82018-exam_g12.png

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

    During a titration, 10.00 mL of acetic acid, HC2H3O2(aq), is completely neutralized by adding 12.50 mL of 0.64 M sodium hydroxide, NaOH(aq).

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

    A sample of nitric acid contains both H3O+ ions and NO3 ions. This sample has a pH value of 1.

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