Write the ionic equation for Zinc and Copper Sulphate.
Zn + Cu2+ = Zn2+ + Cu
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Write the ionic half equations for zinc and copper sulphate.
Zn = Zn2+ + 2e-, Cu2+ + 2e- = Cu
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What is known as corrasion?
Almost all metals react with oxygen and water which is corrasion.
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What is it called when iron corrodes?
Rusting.
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How can you prevent rusting and why?
You can prevent it by creating a barrier between the iron and the atmosphere. It can be formed using grease, oil, paint or plastic coatings.
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Other than grease, oil, paint or plastic what is another way to prevent rusting?
Using sacrificial metal. This is when more reactive metals coat the iron so that they will react with the oxygen and water instead of the iron, even if the coating is broken.
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What is galvanising?
Galvanising is the use of zinc as a sacrificial metal coating. Zinc is more reactive than iron.
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Other cards in this set
Card 2
Front
Write the chemical equation for magnesium and steam.
Back
Mg(s) + H2O(l) = MgO(s) + H2(g)
Card 3
Front
From the most reactive to the least reactive, put these metals in order magnesium, iron, copper, zinc and aluminium.
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