Question

LeChatlier's principle can be used to shift the equilobrium. COmplete these reactions. Explain what happens to the solid compund when you add the second reactant?

a.-Mg(OH)2(s)+MgCl2(aq)

b.-AgCl(s)+ HCl(aq)

c.- CuS2(s)+HNO3(aq)

Answer 1

Le Chatelier's principle stats that

whenever a system in equilibrium is disturbed the system will adjust itself in such a way that the effect of the change will be nullified.

A) reaction shoud be

Mg(OH)2(s) + 2HCl ---> MgCl2(aq) + H₂O

So when more HCl is added to above reaction, the reaction will try to reach equilibrium by going from left to right direction and forming MgCl_2.

B) Reaction should be

Ag₂S(s) + 2 HCl(aq) ---> 2 AgCl(s) + H₂S(g)

So when more HCl is added to above reaction, the reaction will try to reach equilibrium by going from left to right direction and forming AgCl.

C) 3 Cu₂S + 16 HNO₃ -------> 3 CuSO₄ + 3 Cu(NO₃)₂ + 10 NO + 8 H₂O

So when more HNO3 is added to reaction, the excess HNO3 will be adjusted by reaction by going from left to right to form more CuSO₄ & Cu(NO₃)_2.