Electrolysis

Lab report: Electrolysis

Aim: Identify which solutions are conductors of electricity and electrolytes.

Introduction

Electrolyte: The term electrolyte means that this ion is electrically-charged and moves to either a negative (cathode) or positive (anode) electrode.

- Ions that move to the cathode (cations) are positively charged.

- Ions that move to the anode (anions) are negatively charged.

Electrode: An electrode is a conductor that passes an electrical current between a metallic part and a nonmetallic part of a circuit. Found in variable forms, electrodes may be wires, plates, or rods.

Cathode:

• The cathode is the negatively charged electrode.

• The cathode attracts cations or positive charge.

• The cathode is the source of electrons or an electron donor. It may accept positive charge.

Anode:

• The anode is the positively charged electrode.

• The anode attracts electrons or anions.

• The anode may be a source of positive charge or an electron acceptor.

Materials

Beakers Electrode Solutions Power source

Diagram

Data Table

Solution Does it conduct? + Anode -Cathode

Sodium iodide (NaI) Yes Changed to a red-brownish color

Bubbles came out quickly

Ethanol (C2H5OH) Yes The color of the substance started changing to a orange color.

___________

Copper sulphate (CuSO4) Yes Bubbles appear quickly. Bubbles appeared slowly and pure copper is visible.

Potassium Bromide (KBr) Yes _____________ Pure potassium is visible and bubbles appeared slowly.

Sulphuric acid (H2SO4) Yes Bubbles are visible. Bubbles are visible.

Hydrogen Sulphate (H2SO4) Yes Bubbles fizz quickly Bubbles are released

Glucose ( C6H12O6) No ______________

______________

Sucrose (C12H22O11) No ______________ _______________

Calcium hydroxide (CaOH) Yes Bubbles appear quickly Bubbles fizzed quickly

Potassium Chloride (KCl) Yes Bubbles appear Sounds fizzy, colorless solution, bubbles

Discussion

Solution - Cathode + Anode

Sodium iodide (NaI) Hydrogen Iodine

Copper sulphate (CuSO4) Copper Oxygen

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