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Exam 4: Reactions in Aqueous Solution

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Question 61

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In the following chemical reaction the oxidizing agent is 5S + 6KNO₃ + 2CaCO₃ $\rarr$ 3K₂SO₄ + 2CaSO₄ + CO₂ + 3N₂

A) S
B) N₂
C) KNO₃
D) CaSO₄
E) CaCO₃

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Question 62

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Based on the solubility rules, which one of the following should be soluble in water?

A) CaSO₄
B) BaSO₄
C) PbSO₄
D) K₂SO₄
E) AgCl

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Question 63

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Identify the major ions present in an aqueous HNO₃ solution.

One method of determining the concentration of hydrogen peroxide (H₂O₂) in a solution is through titration with iodide ion. The net ionic equation for this reaction is H₂O₂ + 2I^- +2H⁺ $\rarr$ I₂ + 2H₂O A 50.00 mL sample of a hydrogen peroxide solution is found to react completely with 37.12 mL of a 0.1500 M KI solution. What is the concentration of hydrogen peroxide in the sample?

Which substance is acting as a Brønsted acid in the following reaction? HSO₄^- + NH₄⁺ $\rarr$ H₂SO₄ + NH₃

Identify the major ionic species present in an aqueous solution of K₂SO₄.

Identify the element being reduced in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

The oxidation number of N in NO is +7.

The oxidation number of Cl in ClO₃^- is

Select the compound in which sulfur has its highest possible oxidation number.

Define and illustrate with an example the difference between an electrolyte and a nonelectrolyte.

Identify the major ionic species present in an aqueous solution of Na₂CO₃.

What mass of K₂CO₃ is needed to prepare 200.mL of a solution having a potassium ion concentration of 0.150 M?

A piece of copper metal was added to an aqueous solution of silver nitrate, and within a few minutes it was observed that a grey crystalline solid formed on surface of the copper and the solution turned a blue color characteristic of copper(II)ions. Write the net ionic equation for this reaction.

The concentration of oxalate ion (C₂O₄^2-) in a sample can be determined by titration with a solution of permanganate ion (MnO₄^-) of known concentration. The net ionic equation for this reaction is 2MnO₄^- + 5C₂O₄^2- + 16H⁺ $\rarr$ 2Mn²⁺ + 8H₂O + 10CO₂ A 30.00 mL sample of an oxalate solution is found to react completely with 21.93 mL of a 0.1725 M solution of MnO₄^-. What is the oxalate ion concentration in the sample?

Identify the oxidizing agent in the following reaction. 4Al + 3O₂ $\rarr$ 2Al₂O₃

During a titration the following data were collected.A 10.mL portion of an unknown monoprotic acid solution was titrated with 1.0 M NaOH; 40.mL of the base were required to neutralize the sample. What is the molarity of the acid solution?

What is the chemical formula of the salt produced by the neutralization of nitric acid with calcium hydroxide?

Which of the following is an example of a disproportionation reaction?

Which of the following compounds is a weak electrolyte?