Chemistry, 27.02.2020 02:27 anaroles04

Which represents the correct equilibrium constant expression for the reaction below?

Upper C u (s) plus 2 upper A g superscript plus (a q) double-headed arrow upper C u superscript 2 plus (a q) plus 2 upper A g (s).

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Answer from: awkwardness92

$\large\boxed{\large\boxed{K_c=\dfrac{[Cu^{2+}]}{[Ag^+]^2}}}$

Explanation:

1. Chemical equilibrium equation:

$Cu(s)+2Ag^+(aq)\rightleftharpoons Cu^{2+}+2Ag(s)$

2. Species

In an equilibrium constant expression you do not include the solid substances; only gases and dissolved substances.

The symbol (s) means solid, thus Cu(s) and Ag(s) shall not appear in your equilibrium constant expression.

The symbol (aq) means in aqueous solution, thus the both Ag^+ and $Cu^{2+}$ must appear in the equilibrium constant expression.

3. Equilibrium constant expression.

It is the quotient of the product of the concentrations of the species on the right hand side of the equilibrium equation, each raised to its corresponding coefficient, and the product of the concentrations of the species on the left hand side, each raised to its coresponding coefficient.

$K_c=\dfrac{[Cu^{2+}]}{[Ag^+]^2}$

Answer from: Quest

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is $1s^{2}2s^{2}2p^{6}3s^{1}$ and electronic configuration of phosphorous is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$ .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

$3na + p \rightarrow na_{3}p$

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

Electrons are transferred from atoms of to atoms of this transfer makes the sodium atoms and the

Answer from: Quest

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Which represents the correct equilibrium constant expression for the reaction below?

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