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. Give two reasons why graphite (carbon) electrodes are used in electrolysis.

5. You have 2 compounds called X and Y.
X melts at 1200 degrees C and is soluble in water.
Y melts at 156 degrees C and is insoluble in water.

Draw 2 diagrams to show how you could prove which of these substances is an electrolyte or a non- electrolyte.

How would you know which was an electrolyte and which was not.

What must a substance contain to be an electrolyte?

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