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o Ahttps//session.masteringchemistry.com/myctitemViewPassignmentProblemID=8866 Chapter 7 Homework Identifying oxidation-Reduction Reactions a prev Identifying oxidation-Reduction Reactions Part A Which of the following reactions would be classified as oxidation-reduction? Check all that apply. In oxidation-reduction reactions, one substance loses electrons (oxidation) while another substance gains electrons (reduction)A convenient way to recognize oxidation is to look for an increase in charge. Similarly, a convenient way to recognize reduction is to look for a decrease in charge. Consider the following equation: Hints 2MgO()-2MgO) + O29 Here is the same reaction, but with the ionic compound MgO rewritten to show its individual ions: o 2Na(8) + C2 (g)-2NaCI(8) o Na(8) + CuCI(aa)-NaCl(aa) + Cu(s) o NaCN(aa) + CuCI(aa)-NaCl(a) + CuCN(8) 2M2202Mg(0) + 0.9) Now it is much clearer to see that magnesium decreases in charge (reduction) while oxygen increases in charge (oxidation). Submit U. My Answers Give Up Provide Feedbas

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answers:

2Na(S) + cl2(g) ----> 2NaCl(s)

Na(s) + CuCl(aq) ---> NaCl(s) + Cu(s)

in both reactions, Na involves in oxidation.

oxidation : loss of electrons

   Na(S) ----> Na^+(aq) + 1e-

1. redution : gain of electrons

Cl2 + 2e- ----> 2Cl^-(aq)

2. reduction :

Cu^+(aq) + 1e- ----> Cu(s)

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