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Exam 4: Reactions in Aqueous Solution

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Question 61

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The oxidation number of N in NO is +7.

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Question 62

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

A) H₂S
B) SO₂
C) SCl₂
D) H₂SO₃
E) Na₂SO₄

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Question 63

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

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

The oxidation number of Cl in ClO₃^- is

Which of the following compounds is a weak electrolyte?

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

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

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?

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?

Identify the major ions present in an aqueous HNO₃ solution.

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

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.

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

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.

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