Equilibrium

At chemical equilibrium, which of the following statements is correct regarding the rate of forward reaction ($r_f$) and backward reaction ($r_b$)?

What is the correct mathematical relationship between $K_p$ and $K_c$ for a gaseous reaction?

According to the Lewis concept, an acid is defined as a substance that:

What is the pH of a $10^{-3} \text{ M } HCl$ solution at $298 \text{ K}$?

Which of the following mixtures forms an acidic buffer solution?

According to Le Chatelier's principle, increasing the temperature of an endothermic reaction shifts the equilibrium position in which direction?

What is the conjugate acid of $NH_3$?

If the Reaction Quotient ($Q_c$) is greater than the Equilibrium Constant ($K_c$), in which direction will the reaction proceed?

What is the relationship between solubility ($S$) and solubility product ($K_{sp}$) for a salt of $MX_2$ type?

The suppression of dissociation of a weak electrolyte by the addition of a strong electrolyte containing a common ion is called:

For the gaseous equilibrium $PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)$, how will increasing total pressure affect the equilibrium?