1.

Consider separate solutions of 0.500 M C_(2)H_(5)OH_((aq)), 0.100 M Mg_(3)(PO_(4))_(2)(aq), 0.125 M Na_(3)PO_(4)(aq) at 25^(@)C. Which statement is true about tese solutions, assuming all saltes to be strong electrolytes ? Solutions, assuming all salts to be strong electrolytes ?

Answer»

they all have the same osmotic PRESSURE
o.100 M `Mg_(3)(PO_(4))_(2)(AQ)` has the HIGHEST osmotic pressure osmotic pressure.
`0.125 M Na_(3)PO_(4)(aq)` has the highest osmotic pressure.
`0.50 M C_(2)H_(5)OH(aq)` has the highest osmotic pressure.

Solution :Osmotic pressure `pi=I CRT`
For all the solution, R and T are both CONSTANT :
`pipropixxc`
Osmotic pressure depends upon the product of ven't Hoff factor and molar cncentration of the solution. `{:("Solution",i,c,ixc),(C_(2)H_(5)OH(aq),1,0.5,0.5),(Mg_(3)(PO_(4))_(2)(aq),5,0.1,0.5),(KBr(aq),2,0.25,0.5),(Na_(3)PO_(4)(aq),4,0.125,0.5):}`
Since the product is constant, this means that all the soklutions have some osmotic pressure.


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