Consider two separate aqueous solutions: one of a weak acid HA and one of HCl. Assuming you started with 10 molecules of each: a. Draw a picture of what each solution looks like at equilibrium. b. What are the major species in each beaker? c. From your pictures, calculate the K a values of each acid. d. Order the following from the strongest to the weakest base: H 2 O, A − . Cl − . Explain your order.

Interpretation: The situation of equilibrium of the mixture of HA and HCl , major species in a mixture of weak acid HA and HCl , Ka value calculation of each acid, order for strong base among given compounds.

Concept introduction: Strong acids dissociate completely and rapidly in aqueous medium while weak acids dissociates slowly and up to a certain level only. A strong base is the one having the potential to accept a proton rapidly.

To determine: The situation at equilibrium of the mixture of HA and HCl .

Explanation

The compound HCl being a strong acid will dissociate completely and rapidly and reaction will be in forward direction completely.

HCl→H++Cl−

But HA is a weak acid and it would not be dissociating completely and equilibrium will be established due to slow and small extent of dissociation

Interpretation: The situation of equilibrium of the mixture of HA and HCl , major species in a mixture of weak acid HA and HCl , Ka value calculation of each acid, order for strong base among given compounds.

Concept introduction: Strong acids dissociate completely and rapidly in aqueous medium while weak acids dissociates slowly and up to a certain level only. A strong base is the one having the potential to accept a proton rapidly.

To determine:  the major species in a mixture of weak acid HA and HCl

Interpretation: The situation of equilibrium of the mixture of HA and HCl , major species in a mixture of weak acid HA and HCl , Ka value calculation of each acid, order for strong base among given compounds.

Concept introduction: Strong acids dissociate completely and rapidly in aqueous medium while weak acids dissociates slowly and up to a certain level only. A strong base is the one having the potential to accept a proton rapidly.

To determine: The Ka value calculation of HCl and HA .

Interpretation: The situation of equilibrium of the mixture of HA and HCl , major species in a mixture of weak acid HA and HCl , Ka value calculation of each acid, order for strong base among given compounds.

Concept introduction: Strong acids dissociate completely and rapidly in aqueous medium while weak acids dissociates slowly and up to a certain level only. A strong base is the one having the potential to accept a proton rapidly.

To determine: The order for strong base among given compounds.