Chemistry, 30.07.2019 06:10 LindaCat78

Which equation describes a reduction?
mg(s)—mg2+ (aq) + 2e -
201 + 2e -> 201
na(s) — nat(aq) + e
al(s)— a3+ (aq) + 3e -

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Answer from: granniejo

1,3,4 equations represent oxidation as charge increases

Your 2 nd option represents reduction

Answer from: mariagoldgames

Answer : The reduction will be $X_2+2e^-\rightarrow 2X^-$

Explanation :

Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

(a) The given half reactions is:

$Mg(s)\rightarrow Mg^{2+}(aq)+2e^-$

This reaction is an oxidation reaction because in this reaction, the loss of electrons takes place.

(b) The given half reactions is:

$X_2+2e^-\rightarrow 2X^-$

This reaction is an reduction reaction because in this reaction, the gain of electrons takes place.

$Na(s)\rightarrow Na^{+}(aq)+e^-$

This reaction is an oxidation reaction because in this reaction, the loss of electrons takes place.

(d) The given half reactions is:

$Al(s)\rightarrow Al^{3+}(aq)+3e^-$

This reaction is an oxidation reaction because in this reaction, the loss of electrons takes place.

Hence, the reduction will be $X_2+2e^-\rightarrow 2X^-$

Answer from: Quest

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.

Answer from: Quest

answer: e. sour taste

explanation: acids are those substances which dissociates in water to give $h^+$ ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

$hcl\rightarrow h^++cl^-$

bases are those substances which dissociates in water to give $oh^-$ ions or accepts $h^+$ ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

$naoh\rightarrow na^++oh^-$

$nh_3+h^+\rightarrow nh_4^+$

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Which equation describes a reduction?
mg(s)—mg2+ (aq) + 2e -
201 + 2e -> 201
n...

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