Tuesday, October 14, 2008

analysis - NOTES/ flame test

Testing ions by using flame test :
A flame test is used to show the presence of certain metal ions in a compound. A wire of platinum or nichrome is first dipped into a concentrated Hydrochloric acid and then held in a hot bunsen flame ,,this process should be done before testing any ion to clean the wire.
Test for some ions : (by using a flame test)
flame colour
Lithium / Li
Yellow-orange (strong yellow)
Sodium / Na
Orange-red (brick red)
Calcium / Ca
Pale green (apple green)
Barium / Ba
Lilac colour
Potassium / K
Copper / Cu

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chemistry notes / igcse-gcse- Olevel