Home
Class 12
CHEMISTRY
When 1.22 g C(6)H(5)COOH is added into t...

When `1.22 g C_(6)H_(5)COOH` is added into two solvents, the following data of `DeltaT_(b)` and `K_(b)` are obtained:
i. In `100 g CH_(3)COCH_(3)`,`DeltaT_(b)=0.17`,`K_(b)=1.7 kg K mol^(-1)`.
ii. In `100 g` benzene,`DeltaT_(b)=0.13` and `K_(b)=2.6 kg K mol^(-1)`.
Find out the molecular weight of `C_(6)H_(5)COOH` in both cases and interpret the results.

Text Solution

Verified by Experts

The correct Answer is:
`M=122`
`M=244`
Promotional Banner

Similar Questions

Explore conceptually related problems

5g sulphur is present in 100 g of CS_(2). DeltaT_(b) of solution 0.954 and K_(b) is 4.88. The molecular formula of sulphur is

What would be the freezing point of aqueous solution containing 17 g of C_(2)H_(5)OH in 100 g of water (K_(f) H_(2)O = 1.86 K mol^(-1)kg) :

1g of same non volatile solute is added to 100g of two different solvents A and B . K_(b) of A:B=1:5 Find out ((DeltaT_(b))_(A))/((DeltaT_(b))_(B))

45 g of ethylene glycol C_(2)H_(6)O_(2) is mixed with 600 g of water. Calculate (a) the freezing point depression and (b) the freezing point of solution. Given K_(f)=1.86 K kg mol^(-1) .

An aqueous solution of NaCI freezes at -0.186^(@)C . Given that K_(b(H_(2)O)) = 0.512K kg mol^(-1) and K_(f(H_(2)O)) = 1.86K kg mol^(-1) , the elevation in boiling point of this solution is:

What should be the freezing point of aqueous solution containing 17g of C_(2)H(5)OH is 1000g of water ( K_(f) for water = 1.86 deg kg mol^(-1) )?

45 g of ethylene glycol (C_(2) H_(6)O_(2)) is mixed with 600 g of water. The freezing point of the solution is (K_(f) for water is 1.86 K kg mol^(-1) )

What is the freezing point of a solution contains 10.0g of glucose C_(6)H_(12)O_(6) , in 100g of H_(2)O ? K_(f)=1.86^(@)C//m

The freezing point (.^(@)C) of a solution containing 0.1 g of K_(3)[Fe(CN)_(6)] (molecular weight 329) on 100 g of water (K_(f)=1.86 K kg mol^(-1))

12.2 g of benzoic acid is dissolved in (i) 1 kg acetone (K_(b) = 1.9 K kg mol^(-1)) and (ii) 1 kg benzene (K_(b) = 2.6 K kg mol^(-1) . The elevation of boiling points are 0.19^(@)C and 0.13^(@) C , respectively. a. What are the molar masses of benzoic acid in the two solutions ? , b. What are the structures of benzoic acid in the two solutions ?