FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 6: Oxidation-Reduction Reactions

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 71

Multiple Choice

Review LaterAdd Note

Review Later

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Based on this list, which element below would react most readily with a 0.10 M aqueous solution of hydrofluoric acid?

A) Ag
B) Sn
C) Cu
D) Cd
E) Zn

F) B) and E)
G) None of the above

Correct Answer

verified

Show Answer

Question 72

Multiple Choice

Review LaterAdd Note

Review Later

What is the change in the oxidation number of nitrogen in the following? HNO₃ $\rarr$ NO

A) increase by three units
B) increase by four units
C) decrease by two units
D) decrease by three units
E) decrease by four units

F) B) and E)
G) B) and D)

Correct Answer

verified

Show Answer

Question 73

True/False

Review LaterAdd Note

When hydrocarbon compounds undergo combustion, the carbon is always converted into carbon dioxide.

The activity series of metals is Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs Based on this list, which element below would undergo oxidation most readily?

When a metal displaces hydrogen from a nonoxidizing strong acid, which substance is the reducing agent?

Balance the half-reaction, C₈H₁₀ $\rarr$ C₈H₄O₄², taking place in basic media. How many electrons are needed to balance the half-reaction?Hint: Remember the coefficients when balancing half-reactions and look carefully at the oxidation numbers.

Complete the balancing of the following half-reaction, taking place in basic media. How many hydroxide ions are needed to balance the half-reaction? Cr(OH) ₄(aq) $\rarr$ CrO₄²(aq) Hint: Remember the coefficients when balancing half-reactions and look carefully at the oxidation numbers.

Is the following, C₂O₄² → CO₃², an oxidation or a reduction half-reaction?

Consider the redox equation, 2VO₄^3-(aq) + SO₂(g) + 8H⁺(aq) $\rarr$ 2VO²⁺(aq) + SO₄^2-(aq) + 4H₂O(l) Which of the following is correct?Hint: Write out the oxidation numbers for each element in the equation then compare.

Which element would be the least likely to react, if at all, with water?

When hydrocarbon compounds undergo combustion, the hydrogen is always converted into water.

The metals of Group IA undergo reduction more readily than those in any other groups of the periodic table.

When a metal displaces hydrogen from a nonoxidizing strong acid, which substance is the oxidizing agent?

In the equation, Cu²⁺ (aq)+ Al(s) $\rarr$ Cu(s)+ Al³⁺(aq), there is one mole of each species, hence, it is balanced.

What is the change in the oxidation number of chromium in the following? K₂Cr₂O₇ s Cr₂(SO₄) ₃

Is the following, Cr₂O₇² → Cr³⁺, an oxidation or a reduction half-reaction?

Consider the redox equation below: C₄H₁₀(g) + Cr₂O₇²(aq) + H⁺(aq) $\rarr$ H₆C₄O₄(aq) + Cr³⁺(aq) + H₂O(l) The reducing agent is

The amount of iron in a sample can be determined by a titration using dichromate ion, Cr₂O₇^2-, in acidic solution. The iron is first converted to Fe²⁺, which is then titrated by the dichromate ion. The reaction is: 6 Fe²⁺(aq) + Cr₂O₇^2-(aq) + 14 H⁺ $\rarr$ 6 Fe³⁺(aq) + 2 Cr³⁺(aq) + 7 H₂O How many grams of iron are present in a sample if it required 42.7 mL of 0.0180 M Na₂Cr₂O₇(aq) solution for the titration described by the redox equation above?

Zinc metal reacts with nitric acid solution to produce aqueous zinc nitrate, ammonium nitrate (in solution) , and water. The species being oxidized in this reaction is

Consider the unbalanced redox equation, VO₄^3-(aq) + SO₂(g) + 2 H⁺(aq) $\rarr$ VO²⁺(aq) + SO₄^2-(aq) + H₂O(l) The reducing agent is