Home
Class 12
CHEMISTRY
A current of 5.0 A is passed through a 1...

A current of `5.0 A` is passed through a `100L` aqueous solution of sodium soccinate for `4.0h`. The gases produced at anode are collected separately at `25^(@)C` and `1.0 atm` pressure. Find the volume of gases. Also find the `pH` of solution at the end of electrylysis . `(` Assume that at the start of electrolysis, `pH` of solution is `7.0` at `25^(@)C)`

Text Solution

Verified by Experts

At anode `:`
`2F=1mol` of`(CH_(2)=CH_(2)+2mol of CO_(2))`
`2F=3 mol `of gases
Number of Faradays`=(5xx4xx3600)/(96500)=0.746F`
`({:(mol es of gases),(at 25^(@)C and 1 atm):})=(3)/(2)xx0.746~~1.12`
`=1.12xx24.48L`
`=27.4L`
At cathode `:`
`2H_(2)O+2e^(-) rarr 2overset(-)(O)H+H_(2)uarr`
2F=2mol `of `overset(-)(O)H`
`0.746F=0.746` mol of `overset(-)(O)H`
`[overset(-)(O)H]=(0.746Eq)/(100L)=0.007746M` or `N`
`:. pOH=2.13`
`pH=14-pOH=11.87`
Promotional Banner

Similar Questions

Explore conceptually related problems

A current of 0.2ampere is passes through a solution of CuSO_4 for 10 minutes calculate the man of Cu deposited on the cathode.

A current strength of 96.5 A is passed for 10s through 1L of a solution of 0.1 M aqueous CuSO_(4) . Calculate the pH of the solution.

A current strength of 1.0 A is passed for 96.5s through 200mL of a solution of 0.05 M KCl . Find a. The amoudn of gases produced b. The concentration of final solution w.r.t. overset(c-)(O)H ions c. pH of the solution.

1 ml of 0.1 N HCl is added to 1 L solution of sodium chloride. The pH of the resulting solution is

The pH of 10^(-7) HCl aqueous solution of HCl at 25^(@)C is :

20 g of a substance in 2 litre of solution at 10^@C produces an osmotic pressure of 0.68 atm, the mol. wt. of solute is