During the electrolysis of hydrochloric acid, positively charged hydrogen ions move towards
the cathode at a rate of 1018 ions per second. Negatively charged chloride ions move
towards the anode at the same rate. Both hydrogen and chloride ions carry charges of
magnitude 1.6 × 10-19C.
What is the resulting current flow between the electrodes?

Answer:

5) 0.32 A

Total number of ions per second = 10¹⁸ ions

Total charge = 2 x 1.6 x 10⁻¹⁹ C

Current = (2 x 1.6 x 10⁻¹⁹) x (10¹⁸)

(2 x 1.6 x 10⁻¹⁹) x (10¹⁸)

(3.2 x 10⁻¹⁹) x (10¹⁸)

(3.2 x 10⁻¹⁹⁺¹⁸)

(3.2 x 10⁻¹)

0.32 A