An aqueous solution is 0.10 M in Na2SO4 and also 0.15 M in KBr. (a) What is...

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Chemistry

An aqueous solution is 0.10 M in Na₂SO₄and also 0.15 M in KBr.
(a) What is the ionic strength of the mixture?
(b) Which salt makes a greater contribution to the ionicstrength? Why?
(c) What impact does the ionic strength have on the activitycoefficients and activity of each ion? (i) both activitycoefficient and activity increase
Â Â Â Â Â Â Â Â Â Â Â (ii) both activity coefficient and activity decrease
Â Â Â Â Â Â Â Â Â Â Â (iii) activity coefficient decreases and activity increases
Â Â Â Â Â Â Â Â Â Â Â (iv) activity decreases but activity coefficient increases
(d) Write the charge balance equation for this mixture.
(e) Write the mass balance equation for the acid systeminvolving the SO₄^{2 Ì¶} ion. Assume no ionpairing occurs.

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4.2 Ratings (723 Votes)

For 010 M Na2SO4 the ionic strength is 12Na12SO4222 120101202022 030 M The ionic strength for 015 M KBr is 12K12Br12 120151201512 015 M total 010 x 015 0015 M 2 that the unit for ionic strength is molarity but that a salts ionic strength need not match its molar See Answer

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