Chemistry 30

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1. For each of the following reactions, complete the summary table below the equation. If an element does not undergo any change, leave the last two columns blank

a. 4 HCl + O₂ → 2 H₂O + 2 Cl₂

element	Initial Ox. No		Final Ox. No.	e - gained or lost	Oxidized or reduced	Agent
H		→
Cl		→
O		→

b. 4 Al + 3 O₂ → 2 Al₂O₃

element	Initial Ox. No		Final Ox. No.	e - gained or lost	Oxidized or reduced	Agent
Al		→
O		→

c. Fe + SnCl₂ → FeCl_{2 (aq)} + Sn

element	Initial Ox. No		Final Ox. No.	e - gained or lost	Oxidized or reduced	Agent
Fe		→
Sn		→
Cl		→

d. PbO₂ + 4 HI → I₂ + PbI₂ + 2 H₂O

element	Initial Ox. No		Final Ox. No.	e - gained or lost	Oxidized or reduced	Agent
Pb		→
O		→
H		→
I (to I2)		→
I (to PbI2)		→

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2. For each of these reactions, determine whether or not it is a redox reaction. If any are, identify oxidizing and reducing agents in those reactions.

a. CaBr₂ + Pb(NO₃)₂ → PbBr₂ + Ca(NO₃)₂

element	Initial Ox. No		Final Ox. No.	e - gained or lost	Oxidized or reduced	Agent
Ca		→
Br		→
Pb		→
N		→
O		→

b. P₄ + 5O₂ → P₄O₁₀

element	Initial Ox. No		Final Ox. No.	e - gained or lost	Oxidized or reduced	Agent
P		→
O		→

c. SnCl₂ + 2 FeCl₃ → 2 FeCl₂ + SnCl₄

element	Initial Ox. No		Final Ox. No.	e - gained or lost	Oxidized or reduced	Agent
Sn		→
Fe		→

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