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15 cards from this deck
Pure, dry salt crystals
Salt plus water
Sulfates
Chlorides
Nitrates
50 cm350 \text{ cm}^350 cm3
Makes reaction faster and go to completion
Some black powder remains unreacted
Ensures all acid is used up completely
Remove excess copper oxide
Black copper oxide dissolves, solution turns blue
Blue
CuO+H2SO4→CuSO4+H2O\text{CuO} + \text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{H}_2\text{O}CuO+H2SO4→CuSO4+H2O
Clear blue solution
When some black powder remains unreacted
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