Redox Reactions Test

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Half-reaction	$$E^{\circ}(V)$$
$$Rh_{(aq)}^{+3} + 3e^{-} \rightarrow Rh_{(s)}$$	$$0.76\ V$$
$$Au_{(aq)}^{+} + e^{-} \rightarrow Au_{(s)}$$	$$1.69\ V$$

Redox Reactions...

Question 1

Crystal Lynn says synthesis reactions can be classified as redox: $$Na_{(s)} + Cl_{2(g)} \rightarrow 2NaCl_{(s)}$$

Barry Um says decomposition reactions can be classified as redox: $$H_{2}O_{(l)}\rightarrow H_{2(g)} + O_{2(g)}$$

Barry's brother, Cal C. Um states that single replacement reactions can be classified as redox: $$Ag_{(s)} + NaCl_{(aq)} \rightarrow Na_{(s)} + AgCl_{(aq)}$$

Molly Cule state everyone in the group is correct. Redox reactions can be classified as each of the examples cited.

Question 2

Statement $$I$$ is true, Statement $$II$$ is true

Statement $$I$$ is true, Statement $$II$$ is false

Statement $$I$$ is false, Statement $$II$$ is true

Statement $$I$$ is false, Statement $$II$$ is false

Question 3

$$-1$$

$$+7$$

$$+1$$

$$+4$$

Question 4

Numbers of atoms are conserved in a chemical change

Numbers of molecules are conserved in a chemical change

Volume is conserved in a chemical change

'A' and 'B'

'B' and 'C'

Question 5

Nitrogen Gas

Aluminum Nitride

Potassium Nitrate

Nitrous Acid

Question 6

$$3HCl(aq) + Na_{3}PO_{4}(aq) \rightarrow H_{3}PO_{4}(aq) + 3NaCl(aq)$$

$$CO(g) + H_{2}O(g)\rightarrow CO_{2}(g) + H_{2}(g)$$

$$Zn(s) + 2HCl(aq) \rightarrow ZnCl_{2}(aq) + H_{2}(g)$$

$$4Ag(s) + 2H_{2}S(g) + O_{2}(g)\rightarrow 2H_{2}O(g) + 2Ag_{2}S(s)$$

Question 7

(a) and (b)

(a) and (c)

(a), (b) and (c)

All

Question 8

$$1.69\ V + 0.76\ V$$

$$1.69\ V - 0.76\ V$$

$$3(1.69)\ V + 0.76\ V$$

$$3(1.69)\ V - 0.76\ V$$

Question 9

$$Cu^{2+} + 2e^{-} \rightarrow Cu$$

$$Cu \rightarrow Cu^{2+} + 2e^{-}$$

$$NO_{3}^{-} \rightarrow NO_{2} + 1e^{-}$$

$$2H^{+} + NO_{2}^{-} + 1e^{-} \rightarrow NO_{2} + H_{2}O$$

Question 10

$$Zn_{(aq)}^{2+} + Cu_{(s)} \rightarrow Zn_{(s)} + Cu_{(aq)}^{2+}$$

$$Zn_{(s)} + Cu_{(aq)}^{2+} \rightarrow Zn_{(aq)}^{2+} + Cu_{(s)}$$

$$Zn_{(s)} + Cu_{(s)} \rightarrow Zn_{(aq)}^{2+} + Cu_{(aq)}^{2+}$$

$$Zn_{(aq)}^{2+} + Cu_{(aq)}^{2+} \rightarrow Zn_{(s)} + Cu_{(s)}$$

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