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A 2.0 molal solution of sodium chloride ...

A 2.0 molal solution of sodium chloride in water cuses an elevation in boiling point of water by 1.88 K. What is the vlue of Van't Hoff factor ? What does does it signigy ? (`K_(b)` =0.52 K kg `mol^(-1)`).

Text Solution

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The correct Answer is:
1.8076
`i=(DeltaT_(b))/(K_(f)K_(bxxm))`
`DeltaT_(b)=1.88K, K_(b)=0.52" K kg mol"^(-1), m=2.0" molal"=2.0" mol kg"^(-1)`
`i=((1.88K))/((0.52" K kg mol"^(-1))xx(2.0"mol kg"^(-1)))=1.8076`
`"The volue of signifies that when of sodium chloride dissociates in water, it furmnishes 1.8076 molr "Na^(+)" and "CI^(-)" ions".`
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