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GCSE
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Card 6
Front
What are the colours of the three most important oxidation states of chromium?
Back
Card 7
Front
What is the most stable oxidation state of chromium in aqueous solution?
Back
Card 8
Front
What is the colour of the complex formed when an excess of ammonia is added to a solution of cobalt(II) ions?
Back
Card 9
Front
Why must Cu Ions be protected from air?
Back
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