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junior college 2 | H2 Maths
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Pls help how to do this qn!
Date Posted: 7 years ago
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Cr3+ ions produced can be further reduced by zinc into Cr2+, which is blue. Cr2+ can be oxidised by oxygen in air to Cr3+, which is green, or by H+ in the solution (remember the solution is acidified) to Cr3+ as well.
Date Posted:
7 years ago
Thanks alot!!
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