Asked by bill
you have not added enough sodium hydroxide to precipitate all the copper as copper hydroxide. How could you tell that not all the copper had precipitated?
Answers
Answered by
DrBob222
Two simple ways:
1. The blue or green color of the original solution is still there or
2. Let the Cu(OH)2 ppt settle and add 1-2 drops to the supernatant liquid at the top of the container and see if more ppt forms.
1. The blue or green color of the original solution is still there or
2. Let the Cu(OH)2 ppt settle and add 1-2 drops to the supernatant liquid at the top of the container and see if more ppt forms.
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