Question

7. (a) Derive from Ostwald's dilution law, a suitable
equation which may be used to determine A0
and the dissociation constant of a weak
electrolyte graphically.
​

Answer 1

Answer:

sorry....

I don't. know.....

Answer 2

dilution law is a relationship proposed in 1888[1] between the dissociation constant Kd and the degree of dissociation α of a weak electrolyte. The law takes the form[2]

{\displaystyle K_{d}={\cfrac {{\ce {[A+] [B^-]}}}{{\ce {[AB]}}}}={\frac {\alpha ^{2}}{1-\alpha }}\cdot c_{0}}{\displaystyle K_{d}={\cfrac {{\ce {[A+] [B^-]}}}{{\ce {[AB]}}}}={\frac {\alpha ^{2}}{1-\alpha }}\cdot c_{0}}

Where the square brackets denote concentration, and c0 is the total concentration of electrolyte.

Using {\displaystyle \alpha =\Lambda _{c}/\Lambda _{0}}{\displaystyle \alpha =\Lambda _{c}/\Lambda _{0}}, where {\displaystyle \Lambda _{c}}\Lambda _{c} is the molar conductivity at concentration c and {\displaystyle \Lambda _{0}}\Lambda _{0} is the limiting value of molar conductivity extrapolated to zero concentration or infinite dilution, this results in the following relation:

{\displaystyle K_{d}={\cfrac {\Lambda _{c}^{2}}{(\Lambda _{0}-\Lambda _{c})\Lambda _{0}}}\cdot c_{0}}{\displaystyle K_{d}={\cfrac {\Lambda _{c}^{2}}{(\Lambda _{0}-\Lambda _{c})\Lambda _{0}}}\cdot c_{0}}