4Laboratory work 9 Defining electric charge of the monovalent ion

-to define an electronic charge in the electrolysis process experimentally

cuvette with electrodes, a multimeter
rheostat-potentiometer
adapter
scale
vessel with a solution of blue vitriol
clock
connecting wires

Don't forget about safety!!!

The mass of substance released on the cathode over a certain period of time can be determined by the formula

For experiments, aqueous solution of sulphate (CuSO4) can be used, as well as electrode - copper plates. The charge electron can be determined by the formula derived from Faraday's law for electrolysis :

m - the mass of the substance released on the electrode
M - the molar mass of the substance
n - the valence of this substance
𝑁 𝐴 𝑁𝑁 𝑁 𝐴 𝐴𝐴 𝑁 𝐴 - the Avogadro constant
I - the current strength that has passed through the electrolyte solution
t - the current passing time

The mass of copper released on the cathode is determined by weighing the cathode before and after the experiment. Therefore, m = 𝑚 2 𝑚𝑚 𝑚 2 2 𝑚 2 − 𝑚 1 𝑚𝑚 𝑚 1 1 𝑚 1 , and the formula for determining the electron charge will take the form:

To measure the current using a school ammeter. A rheostat in the circuit is needed to regulate the strength of the current.