redox reactions
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what is the oxidising agent to oxidise Iron (II) to Iron (III)
H+/MnO4
what is the reducing agent to reduce Iron (III) to (II)
excess potassium iodide - potassium ions are spectator ion
what is the oxidising agent to oxidise Chromium (III) ion to CrO4 2-
hot alkaline hydrogen peroxide.
what is the colour of CrO4 2-
bright yellow
what is the reducing agent to reduce Cr2O7 2- to Cr3+
zinc (if in excess than will be reduced to Cr 2+)
what is the reducing agent used to reduce Copper(II) to Copper (I)
excess KI (k+ ions are spectator)
what is the reagent that causes a disproportionation reaction with copper (I)
hot dilute H2SO4
what colour are Fe 2+ ions
pale green
what colour are MnO4 - ions
purple
what colour are Fe3+ ions
yellow
what colour are Mn 2+ ions
pale pink
what colour are I - ions
colourless
what colour are Cr 3+ ions
violet
what colour are CrO4 2- ions
bright yellow
what colour are Cr2O7 2- ions
orange
what colour are Cr 2+ ions
pale blue
what colour precipitate is CuI
white
what colour is Cu2O
black solid
what colour is CuSO4
pale blue
what colour is Cu
orange