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Chemistry

GCSE · Edexcel

QuestionsFlashcards

Group 1
- Group 1 (Alkali Metals)
  6
- Group 1: Reactivity & Electronic Configurations
  6
Group 7
Group 0

Qualitative Analysis: Tests for Ions
Hydrocarbons
Polymers
Alcohols & Carboxylic Acids
Bulk & Surface Properties of Matter Including Nanoparticles
- Nanoparticles
  7
- Ceramics, Polymers, Composites & Metals
  5

Electrolysis Flashcards

All 6 cards in this deck

What is an electrolyte?: An ionic compound that is molten or dissolved in water, so its ions are free to move.
What is electrolysis?: The process in which electrical energy from a direct current (d.c.) supply decomposes an electrolyte.
Why does a solid ionic compound not conduct electricity?: Its ions are held in fixed positions and are not free to move.
In an electrolysis cell, what are the names and charges of the two electrodes?: Anode = positive electrode; cathode = negative electrode.
During electrolysis, where do the cations and the anions move to? e.g. molten lead bromide: Cations to the negative cathode, anions to the positive anode.

e.g. $\mathrm{Pb^{2+}}$ to the cathode, $\mathrm{Br^-}$ to the anode.
True or false? Calcium carbonate mixed with water behaves as an electrolyte.: False. Calcium carbonate is insoluble, so its ions are not free to move in the water.