If the Ka value for a weak acid HA is 1.0 x 10^-5, and the initial concentration of HA is 0.2 M, the hydronium ion concentration at equilibrium is approximately:

For the weak acid H2CO3 (carbonic acid), the equilibrium reaction is:

If the pOH of a solution is 2.5, what is the pH of the solution?

For the reaction: 2 CO (g) + O2 (g) ⇌ 2 CO2 (g), if the initial concentrations are = 0.3 M, = 0.1 M, and = 0 M, and the value of Kc is 2.0, what is the concentration of CO2 at equilibrium?

For a weak base BOH, the Henderson-Hasselbalch equation is:

If the Ksp value for a slightly soluble salt AB2 is 1.0 x 10^-10, and the concentration of A2+ at equilibrium is 1.0 x 10^-4 M, the concentration of B- at equilibrium is:

If the Ka value for a weak acid HA is 1.0 x 10^-4, and the pH of a 0.2 M solution of HA is 3.6, the value of at equilibrium is approximately:

If the pH of a 0.1 M solution of a weak acid HA is 4.2, the value of Ka for HA is approximately:

For a weak acid HA, the Henderson-Hasselbalch equation is:

For the reaction: 2 SO2 (g) + O2 (g) ⇌ 2 SO3 (g), the value of Kc at a certain temperature is 4.0. If the initial concentrations are = 0.5 M, = 0.2 M, and = 0 M, the direction of the net reaction at equilibrium is: