Chemistry 9701 · AS & A Level · Electrochemistry

Electrochemistry — practice question

(a)[1]

State the connection between the Faraday constant, $F$, the charge on the electron, $e$, and the Avogadro number, $L$.

(b(i))

Draw a diagram of apparatus suitable for this experiment. Label the power supply (with $+$ and $-$ terminals), the anode, the cathode and the ammeter. State what the electrolyte is made of.

(b(ii))[9]

Use the data provided and the relevant information from the Data Booklet to determine a value of $L$ to $3$ significant figures.

(c)[5]

Use relevant information from the Data Booklet to identify the substances formed at the anode and the cathode when aqueous solutions of the following compounds are electrolysed: AgF, FeSO$_4$, MgBr$_2$.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: The correct relationship is $L = \frac{F}{e}$ or $F = Le$

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI