A student carried out the electrolysis of a KI solution for a period of 15 minutes. He estimated that 8.5 X 10^-4 moles of OH- were produced.

- Write the two half reactions and the net reaction of the electrolysis

Catod: K^(+), H2O

2H2O  + 2e^(-)  ---> H2 + 2OH^(-) reduction reaction

Anod: I^(-), H2O

2I^(-) ---> I2 + 2e^(-) oxidation reduction

2H2O + 2I^(-) ---> I2 + H2 +2OH^(-)   ionic net reaction

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

where are the choice options?