Question 1

In the following redox reaction which element is being oxidized? Cu(s) + 4 HNO₃(aq) $\rightarrow$ Cu(NO₃)₂ (aq) + 2 NO₂

Accepted Answer

Copper (Cu) is being oxidized as it goes from a neutral element in its solid form to a positively charged ion in solution, indicating a loss of electrons.

Question 2

Which one of the following is an oxidation-reduction reaction?

Accepted Answer

In option C, the oxidation state of nitrogen changes from +5 in KNO3 to +3 in KNO2, indicating a redox reaction.

Question 3

In the following oxidation-reduction reaction, which of the following statements is true? Sr(s) + 2 H₂O(l) $\rightarrow$ Sr²⁺(aq) + 2 OH^-(aq) + H₂(g)

Accepted Answer

In the reaction, water (H₂O) provides the oxygen that oxidizes Sr to Sr²⁺, thus acting as the oxidizing agent.

Question 4

Phosphorus is reduced in which of the following reactions?

Accepted Answer

In option D, phosphorus starts in its elemental form with an oxidation state of 0 and is converted into a compound where it has a lower oxidation state, indicating reduction.

Question 5

Which isn't an oxidation-reduction reaction?

Accepted Answer

The answer of Which isn't an oxidation-reduction reaction?
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Question 6

Identify the reducing agent and oxidizing agent in the reaction: H₂O₂(aq) + 2 HI(aq) $\rightarrow$ 2 H₂O(l) + I₂(s)

Accepted Answer

The answer of Identify the reducing agent and oxidizing agent...

Question 7

The name for Li₃N is:

Accepted Answer

Li3N is named lithium nitride because it consists of lithium ions and nitride ions, and lithium forms a +1 charge, not requiring a Roman numeral.

Question 8

Which of the following formula/name combinations is incorrect?

Accepted Answer

The correct name for ClO₄^- is perchlorate ion, not hypochlorate ion.

Question 9

Name this compound: CoSO₃

Accepted Answer

CoSO₃ is cobalt(II) sulfite. "Co" stands for cobalt, and "SO₃" is the sulfite ion. The (II) indicates the +2 oxidation state of cobalt.

Question 10

Name this compound: SrSO₄

Accepted Answer

SrSO₄ is named strontium sulfate, where Sr is strontium and SO₄ is the sulfate ion.

Question 11

Give the chemical formula for barium chromate.

Accepted Answer

The chemical formula for barium chromate is BaCrO4, which corresponds to choice D.

Question 12

Give the chemical formula for ammonium bromide.

Accepted Answer

Ammonium bromide is represented by the chemical formula NH4Br.

Question 13

Give the name for the compound Fe₂O₃.

Accepted Answer

The compound Fe2O3 is known as iron (III) oxide, indicating that iron has a +3 oxidation state in this compound.

Question 14

Give the chemical formula for perchloric acid.

Accepted Answer

Perchloric acid has the chemical formula HClO4, which corresponds to the formula given in choice D when the subscript formatting is correctly interpreted.

Question 15

Give the name for the compound ZnSO₃.

Accepted Answer

The compound ZnSO₃ is named zinc sulfite. Sulfite refers to the SO₃²⁻ ion, and zinc typically has a +2 oxidation state, so the compound is zinc sulfite.

Question 16

Give the chemical formula for ammonium cyanide.

Accepted Answer

The chemical formula for ammonium cyanide is NH4CN, which is represented by choice B. Ammonium is NH4+ and cyanide is CN-, combining them gives NH4CN.

Question 17

Give the name for the compound Cl₂O.

Accepted Answer

The correct name for the compound with the formula Cl2O is dichlorine monoxide. This name follows the standard nomenclature for binary compounds, indicating two chlorine atoms (dichlorine) and one oxygen atom (monoxide).

Question 18

Give the chemical formula for hyposulfurous acid.

Accepted Answer

Hyposulfurous acid is a sulfur oxoacid with the chemical formula H₂SO₂.

Question 19

Give the name for the compound HNO₂.

Accepted Answer

HNO₂ is known as nitrous acid, which is a weak acid and contains nitrogen in the +3 oxidation state.

Question 20

Give the chemical formula for copper(I)chloride.

Accepted Answer

Copper(I) chloride consists of copper in the +1 oxidation state and chloride, resulting in the formula CuCl.

Quiz 5: Ionic and Metallic Bonds

In the following redox reaction which element is being oxidized? Cu(s) + 4 HNO₃(aq) $\rightarrow$ Cu(NO₃) ₂ (aq) + 2 NO₂

Which one of the following is an oxidation-reduction reaction?

In the following oxidation-reduction reaction, which of the following statements is true? Sr(s) + 2 H₂O(l) $\rightarrow$ Sr²⁺(aq) + 2 OH^-(aq) + H₂(g)

Phosphorus is reduced in which of the following reactions?

Which isn't an oxidation-reduction reaction?

Identify the reducing agent and oxidizing agent in the reaction: H₂O₂(aq) + 2 HI(aq) $\rightarrow$ 2 H₂O(l) + I₂(s)

The name for Li₃N is:

Which of the following formula/name combinations is incorrect?

Name this compound: CoSO₃

Name this compound: SrSO₄

Give the chemical formula for barium chromate.

Give the chemical formula for ammonium bromide.

Give the name for the compound Fe₂O₃.

Give the chemical formula for perchloric acid.

Give the name for the compound ZnSO₃.

Give the chemical formula for ammonium cyanide.

Give the name for the compound Cl₂O.

Give the chemical formula for hyposulfurous acid.

Give the name for the compound HNO₂.

Give the chemical formula for copper(I) chloride.

Quiz 5: Ionic and Metallic Bonds

In the following redox reaction which element is being oxidized? Cu(s) + 4 HNO3(aq) →\rightarrow→ Cu(NO3) 2 (aq) + 2 NO2

Which one of the following is an oxidation-reduction reaction?

In the following oxidation-reduction reaction, which of the following statements is true? Sr(s) + 2 H2O(l) →\rightarrow→ Sr2+(aq) + 2 OH-(aq) + H2(g)

Phosphorus is reduced in which of the following reactions?

Which isn't an oxidation-reduction reaction?

Identify the reducing agent and oxidizing agent in the reaction: H2O2(aq) + 2 HI(aq) →\rightarrow→ 2 H2O(l) + I2(s)

The name for Li3N is:

Which of the following formula/name combinations is incorrect?

Name this compound: CoSO3

Name this compound: SrSO4

Give the chemical formula for barium chromate.

Give the chemical formula for ammonium bromide.

Give the name for the compound Fe2O3.

Give the chemical formula for perchloric acid.

Give the name for the compound ZnSO3.

Give the chemical formula for ammonium cyanide.

Give the name for the compound Cl2O.

Give the chemical formula for hyposulfurous acid.

Give the name for the compound HNO2.

Give the chemical formula for copper(I) chloride.

In the following redox reaction which element is being oxidized? Cu(s) + 4 HNO₃(aq) $\rightarrow$ Cu(NO₃) ₂ (aq) + 2 NO₂

In the following oxidation-reduction reaction, which of the following statements is true? Sr(s) + 2 H₂O(l) $\rightarrow$ Sr²⁺(aq) + 2 OH^-(aq) + H₂(g)

Identify the reducing agent and oxidizing agent in the reaction: H₂O₂(aq) + 2 HI(aq) $\rightarrow$ 2 H₂O(l) + I₂(s)

The name for Li₃N is:

Name this compound: CoSO₃

Name this compound: SrSO₄

Give the name for the compound Fe₂O₃.

Give the name for the compound ZnSO₃.

Give the name for the compound Cl₂O.

Give the name for the compound HNO₂.