Question 1

Consider the following reaction: $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g). $$Which statement correctly describes the oxidation and reduction processes occurring in this reaction?

Accepted Answer

O is oxidized, Pb is reduced

Question 2

In the reaction $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g)$$, what is the oxidation state of Pb in $$PbO$$ and in $$Pb(s)$$, respectively?

Accepted Answer

$$+2 in$$ $$PbO$$, $$0 in$$ $$Pb(s)$$

Question 3

Which species acts as the reducing agent in the reaction $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g)$$?

Accepted Answer

$$PbO(s)$$

Question 4

In the decomposition of lead(II) oxide, $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g)$$, which element undergoes oxidation?

Accepted Answer

Oxygen

Question 5

During the reaction $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g)$$, what happens to the oxidation state of oxygen?

Accepted Answer

It increases from $$-2 to$$ $$0$$

Question 6

Which of the following best describes the type of reaction for $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g)$$?

Accepted Answer

Decomposition and redox

Question 7

If $$2.00$$ moles of $$PbO(s)$$ decompose according to $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g)$$, how many moles of $$O_2(g$$)$$ are produced?

Accepted Answer

$$1.00$$ mol

Question 8

Which of the following statements is true regarding the electron transfer in the reaction $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g)$$?

Accepted Answer

Oxygen loses electrons and is oxidized

Question 9

In the reaction $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g)$$, which of the following best describes the change in oxidation state for lead?

Accepted Answer

It decreases from $$+2 to$$ $$0$$

Question 10

A student claims that both lead and oxygen are reduced in the reaction $$2PbO(s) \rightarrow 2Pb(s) + O_2$(g). $$Which of the following best evaluates this claim?

Accepted Answer

The claim is incorrect because only lead is reduced; oxygen is oxidized.

Redox Reactions: Identifying Oxidation and Reduction in Chemical Equations

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