Home
Class 12
CHEMISTRY
If the observed and theoretical molecula...

If the observed and theoretical molecular mass of `NaCI` is found to be `31.80` and `58.50`, then the degree of dissociation of `NaCI` is:

A

`83.96%`

B

`8.39%`

C

`90%`

D

`100%`

Text Solution

Verified by Experts

The correct Answer is:
A
`i = 1 + alpha =(58.5)/(31.8)`
`alpha = 83.96%`
Promotional Banner

Similar Questions

Explore conceptually related problems

A big irrengular shaped vessel contained waer the sp conductance of which was 2.56 xx 10^(-5) mho cm^(-1) 500g of NaCI was then added to the water and the specific conductance after the addition of NaCI was found to be 3.10 xx 10^(-5) mho cm^(-1) . find the capacity of the vessel if it is fulfilled with water (lambda_(oo)NaCI = 149.9)

A solution containing 0.85 g of ZnCI_(2) in 125.0g of water freezes at -0.23^(@)C . The apparent degree of dissociation of the salt is: (k_(f) for water = 1.86 K kg mol^(-1) , atomic mass, Zn = 65.3 and CI = 35.5)

A compound on analysis gave the following percentage composition: Na=14.31% S = 9.97%, H = 6.22%, O = 69.5%, calcualte the molecular formula of the compound on the assumption that all the hydrogen in the compound is present in combination with oxygen as water of crystallisation. Molecular mass of the compound is 322 [Na = 23, S = 32, H = 1, 0 = 16].

After electrlysis of NaCI solution with inert electrodes for a certain period of time 600mL of the solution was left. Which was found to be 1N in NaOH . During the same time, 31.75 g of Cu deposited in the copper voltameter in series the electrolytic cell. calculate the percentage yield of NaOH obtained.

A one litre solution is prepared by dissolving some lead-nitrate in water. The solution was found to boil at 100.15^(@)C . To the resulting solution 0.2 mole NaCI was added. The resulting solution was found to freeze at 0.83^(@)C . Determine solubility product of PbCI_(2) . Given K_(b) = 0.5 and K_(f) = 1.86 . Assume molality to be equal to molarity in all case.

A rod OA rotates about a horizontal axis through O with a constant anti-clockwise velocity omega=3 rad//s. As it pases the positions theta=0^(@) a small block of mass m is placed on it at a radial distacne r=450 mm If the block is observed to slip at theta=50^(@) the coefficient of static friction bewteen the block and the rod is (Given that , sin50^(@)=0766,cos 50^(@)=0.64 )

Give one example of a binomial of degree 50 and a monomial of degree 80.