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Including activity coefficients, find the molar concentration of Ba2+ in a 0.0500 M solution of tetramethylammonium...

Including activity coefficients, find the molar concentration of Ba2+ in a 0.0500 M solution of tetramethylammonium iodate (soluble salts which completely dissociates into (CH3)4N+ and IO3- ions in aqueous solution. Hint: the [IO3- ] from the slightly soluble BaIO3 in negligible.

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Answer #1

For calculating activity coefficients we need to calculate solution's ionic strength.

So,let's begin by calculating the solution's ionic strength. For it we can use the formula

where is molar concentration of ith ion present in the solution and is the charge on the ion.

Since is slightly soluble in aqueous solution we can neglect it's contribution in the ionic strength.

Hence we will only consider two ions of tetramethylammonium iodate.

we have

             

             

            

           

           

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