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chemistry

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4. 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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    4. Graphite is a good electrical conductor and does not react chemically with most electrolytes.

    5. (a) Ionic solids have high melting points and many of them have high solubility in water. (b) Molecular solids have low melting points and many of them do not dissolve in water.

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