Question 6.14: Calculate the ionic strength of 0.10 M NaCl. Repeat the calc...
Calculate the ionic strength of 0.10 M NaCl. Repeat the calculation for a solution of 0.10 M Na_2SO_4.
The ionic strength for 0.10 M NaCl is
\mu =\frac{1}{2} ([Na^+ ](+1)^2+ [Cl^–](–1 )^2 )=\frac{1}{2} [(0.10)(+1)^2 +(0.10)(–1)^2 ] =0.10 M
For 0.10 M Na_2SO_4, the ionic strength is
\mu =\frac{1}{2} ([Na^+ ](+1)^2+ [SO_4 ^{2-}](–2 )^2 )=\frac{1}{2} [(0.20)(+1)^2 +(0.10)(–2)^2 ] =0.30 M
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