Chemistry, 23.08.2019 20:40 hbkakabryce0p3fkoq

Use electron transfer or electron shift to identify what is oxidized and what is reduced in each reaction :
a) 2na(s) + br2(l) > 2nabr(s)
b) h2(g) + cl2(g) > 2hcl(g)
c) 2li(s) + f2(g) > 2lif(s)
d) s(s) + cl2(g) > scl2(g)
e)n2(g) + 2o2(g) > 2no2(g)
f) mg(s) +cu(no3)2(aq) = mg(no3)2(aq) + cu(s)
for each reaction above, identify the reducing agent and the oxidizing agent

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Answer from: wrolle

A) Na is oxidised Br is reduced
b) H is oxidised Cl is reduced
c) Li is oxidised F is reduced
d)S is oxidised Cl is reduced
e) N is oxidised O is reduced
f) Mg is oxidised and N is reduced

Remember: Oxidation= loss and Reduction= gains

Answer from: Vanesssajohn6294

Answer :

Oxidation-reduction reaction : It is a type of reaction in which oxidation and reduction reaction occur simultaneously.

Oxidation reaction : It is the reaction in which a substance looses its electrons. In the oxidation reaction, the oxidation state of an element increases.

Reduction reaction : It is the reaction in which a substance gains electrons. In the reduction reaction, the oxidation state of an element decreases.

(a) The balanced chemical reactions is,

$2Na(s)+Br_2(l)\rightarrow 2NaBr(s)$

Half reactions of oxidation and reduction are :

Oxidation : $Na\rightarrow Na^{1+}+1e^-$

Reduction : $Br_2+2e^-\rightarrow 2Br^{1-}$

From this we conclude that, 'Na' is oxidized and 'Br_2' is reduced in this reaction. The reducing agent is, 'Na' and oxidizing agent is, 'Br_2' .

(b) The balanced chemical reactions is,

$H_2(g)+Cl_2(g)\rightarrow 2HCl(g)$

Half reactions of oxidation and reduction are :

Oxidation : $H_2\rightarrow H^{1+}+1e^-$

Reduction : $Cl_2+2e^-\rightarrow 2Cl^{1-}$

From this we conclude that, 'H_2' is oxidized and 'Cl_2' is reduced in this reaction. The reducing agent is, 'H_2' and oxidizing agent is, 'Cl_2' .

$2Li(s)+F_2(g)\rightarrow 2LiF(s)$

Half reactions of oxidation and reduction are :

Oxidation : $Li\rightarrow Li^{1+}+1e^-$

Reduction : $F_2+2e^-\rightarrow 2F^{1-}$

From this we conclude that, 'Li' is oxidized and 'F_2' is reduced in this reaction. The reducing agent is, 'Li' and oxidizing agent is, 'F_2' .

(d) The balanced chemical reactions is,

$S(s)+Cl_2(g)\rightarrow SCl_2(g)$

Half reactions of oxidation and reduction are :

Oxidation : $S\rightarrow S^{2+}+2e^-$

Reduction : $Cl_2+2e^-\rightarrow 2Cl^{1-}$

From this we conclude that, 'S' is oxidized and 'Cl_2' is reduced in this reaction. The reducing agent is, 'S' and oxidizing agent is, 'Cl_2' .

(e) The balanced chemical reactions is,

$N_2(g)+2O_2(g)\rightarrow 2NO_2(g)$

Half reactions of oxidation and reduction are :

Oxidation : $N_2\rightarrow N^{4+}+4e^-$

Reduction : $O_2+4e^-\rightarrow 2O^{2-}$

From this we conclude that, 'N_2' is oxidized and 'O_2' is reduced in this reaction. The reducing agent is, 'N_2' and oxidizing agent is, 'O_2' .

(f) The balanced chemical reactions is,

$Mg(s)+Cu(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Cu(s)$

Half reactions of oxidation and reduction are :

Oxidation : $Mg\rightarrow Mg^{2+}+2e^-$

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

From this we conclude that, 'Mg' is oxidized and 'Cu' is reduced in this reaction. The reducing agent is, 'Mg' and oxidizing agent is, 'Cu'.

Answer from: Quest

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

Answer from: Quest

the answer is c

tell me if wrong

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