Equilibrium Concentration of H+ in Monobasic Acid

Hard General Chemistry Acids And Bases

In a laboratory, a chemist is investigating the behavior of a monobasic acid (HA) that dissociates in water according to the following reaction:

HA (aq) <=> H⁺ (aq) + A^- (aq)

The equilibrium constant for this dissociation at 25°C is found to be 4.0 x 10^-5. If the initial concentration of HA is 0.1 M, what will be the concentration of H⁺ ions at equilibrium?

1.0 x 10-5 M

2.0 x 10-5 M

4.0 x 10-5 M

2.0 x 10-4 M

Hint

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