Equilibrium Tes...

$$Ag_3 PO_4$$ would be least soluble at 25$$^o$$C in

Equilibrium constant for the given reaction is $$K = 10^{20}$$ at temperature $$300 K$$
$$A(s) + 2B (aq.)  \rightleftharpoons  2C (s) + D(aq.)$$;        $$K= 10^{20}$$
The equilibrium concentration of B starting with a mixture of $$1 mol/lit$$ of A and $$1/3 mol/lit$$ of B at $$300 K$$ is ________.

The value of K for a reaction can be changed by changing :

The degree of dissociation of $$PCl_{5}(g)\rightleftharpoons PCl_{3}(g)+Cl_{2}(g)$$, ___________ with increase in pressure at equilibrium. 

Assertion(A): In the dissociation of $$PCl_{5}$$ at constant pressure and temperature addition of helium at equilibrum increases the dissociation of $$PCl_{5}$$.
Reason(R): Helium removes $$Cl_{2}$$ from the field of action.

Ammonia is a weak base that reacts with water according to the equation $$NH_{3}(aq)+H_{2}O(l)\rightleftharpoons NH_{4}^{+}+OH^{-}(aq)$$. Will any of the following increase the percent of ammonia that is converted to the ammonium ion in water?

Introduction of inert gas at constant volume to a gaseous reaction at equilibrium, results in formation of :

$$N_{2}+O_{2}$$$$\rightleftharpoons$$  $$2NO-Heat$$ 

Given that $$K_w$$ for water is $$10^{-13}M^2$$ at $$2^oC$$, compute the sum of $$p{OH}$$ and $$p{H}$$ for a neutral aqueous solution at $$2^oC$$?

Which of the following is a buffer solution?