Redox reactions between Cr 3+ and H2O2, Zn and Cr2O7 2- and Cu2+ and 2I-
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What conditions are required?
hot, alkaline
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what does H2O2 act as?
an oxidising agent
3
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Cr2O7 2- is ____ to ____
reduced, Cr 3+
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Zn is ___ to ____?
oxidised to 2+
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whats the colour change in the Cr2O7 2- reaction?
orange to green
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What is the colour change and product in Cu2+ and I reaction?
blue to brown solution with white precipitate from CuI
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What is the colour change reaction between Cu2O + H2SO4?
blue solution and brown solid (Cu) produced
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colour change for Fe3+ ions reacting with I- ions?
orange-brown to brown
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what reagents are used to oxidise chromium (III) to chromate (VI)?
NaOH and H202 (hot alkaline solution of hydrogen peroxide)
Note 
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