Home
Class 12
CHEMISTRY
The number of atoms of Ca that will be d...

The number of atoms of `Ca` that will be deposited from a solution of `CaCl_(2)` by a current of `25mA` for `60s` will be

A

`4.68xx10^(18)`

B

`4.68xx10^(15)`

C

`4.68xx10^(10)`

D

`2.34xx10^(15)`

Text Solution

Verified by Experts

The correct Answer is:
a
`25xx10^(-3)Axx60 C` of charge carried by
`=(25xx10^(-3)xx60s)/(96500C)=1.55xx10^(-5) mol e^(-)`
`Ca^(2+)+2e^(-) rarr Ca`
`2 mol ` of `e^(-)` will produce `=6xx10^(23)` atoms of `Ca`
`1.55xx10^(-5) mol e^(-)` will produce
`=(1.55xx10^(-5)xx6xx10^(23)/(2)=4.68xx10^(18)` atoms of `Ca`
Promotional Banner

Similar Questions

Explore conceptually related problems

Calculate the mass of silver deposited from silver nitrate solution by a current of 2 amperes flowing for 30 minutes?

The mass of copper deposited when a solution of CuSO_(4) is electrolysed for 10 min with a current of 1.5 ampere is

What is the amount of Al deposited on the electrolysis of molten Al_(2)O_(3) when a current of 9.65 A is passed for 10.0 s .

The total number of moles present in 111g of CaCl_2 is

The number of positive integer solutions of a+b+c=60, where a is a factor of b and c, is

The number of gram atoms of oxygen present in 0.25 g mole of (COOH)_2 2H_2O is :

Calculate number of atoms in (a) 2.5 mole atoms of nitrogen (b) 8.4 of sulphur