Transition elements
Read our general notes on Risk Assessment
What is the colour of these aqueous solutions?:
A. calcium hydroxide
B. iron(III) trioxonitrate(v)
C. copper(II) tetraoxosulphate(VI)
D. potassium heptaoxodichromate(VI)
Ulex says
A: Colourless (NB do not answer ‘clear’ – ‘clear’ is not a colour)
B: Yellow
C: Blue
D: Orange
Risk assessment
Before attempting any practical work based on the advice and suggestions on this website, you must do the following. Identify any hazards, assess the risks from these hazards, and then decide appropriate control measures to reduce the risks. You must have these approved by those in authority in your school or college laboratory. Do not rely on what is said on this website.
For further guidance see our tutorial on Risk Assessment.
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updated: 11 May 2006
