Question

The solubility of the salt MxAy is 1.0 ´ 10-2 mol/L at 25°C. The osmotic pressure
exhibited by a solution saturated with MxAy at 25°C is 1.22 atm. Determine the values
of x and y by assuming ideal behavior.

Answer 1

solna Giren Solubilife ef of salt MacAy = 102 mol/L ac. at temperature T 25 c = 25+273 = 298k Osmotic revure = II = 1.22 atm. We know, Osmotic press ux is given by π = iC RT. where it is vant Hoff factor R = 0.0821 atm-L mol-k so, substitetting values we get 122 = (0) (103) (0.08 21) (298) on solving, we get C 1- 4.98 5 . i denotes number of ions dissociated by salt in solution So, Mx Ay (s) - RM (aq) + yA *- Assurning ideal behaviour, Total jons dissociated -ary so, [ety=5 L Now, valus of x f g can be. x=2 or 2-3 4-3 1=2 l - More appropriate