chemistry Test Worksheet: Table K Common Acids

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Chemistry worksheet
Topic: Table K Common Acids

Table K Common Acids

Which compound yields H⁺ ions as the only positive ions in an aqueous solution?

(1) KOH

(2) NaOH

(3) CH₃OH

(4) CH₃COOH

Which substance is an Arrhenius acid?

(1) H₂

(2) HCl

(3) KCl

(4) NH₃

Which compounds are classified as Arrhenius acids?

(1) HCl and NaOH

(2) HNO₃ and NaCl

(3) NH₃ and H₂CO₃

(4) HBr and H₂SO₄

Which formula represents an Arrhenius acid?

(1) KCl

(2) HCl

(3) NH₃

(4) KOH

Base your answers to questions 5 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.

Identify the positive ion in the sample of HCl(aq).

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

• hydronium ion

• H₃O⁺

• hydronium

• H⁺

• hydrogen ion

• H₃O⁺(aq)

• hydrogen

• H⁺(aq)

• proton

Base your answers to questions 6 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.

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

Identify the positive ion present in the H₂SO₄(aq) solution before the titration.