Qualification > Sciences
Chemistry paper 1 help
The Golden Girl =D:
--- Quote from: red_911 on May 24, 2010, 05:35:54 pm ---yeah i knew abt the reactivity .. bt was kinda confused ...got it now ...Thanks :D
--- End quote ---
cool ;)
holtadit:
Heating copper will cause it to OXIDISE - ITS MASS INCREASES
The Golden Girl =D:
--- Quote from: weaam on May 24, 2010, 05:43:59 pm ---Theres this question in oct/nov 04 Q11, that says:
' A substance X is heated in an evaporating basin until there is no further change.
mass of basin
before heating 25.52g
after heating 26.63g
What could X be?
A copper
B copper (II) carbonate
C Copper (II) oxide
D Hydrated copper (II) sulphate'
ms says the answer is A, i dunt get it, i thought substances decrease in size or breakdown when heated :-\
--- End quote ---
copper oxidizes when it is not in a compound , got it ;)
Weaam:
Oh yeah, that totally slipped my mind!
Thanks you guys, i owe you one ;)
blackberry:
y doesnt copper react directly wid hcl to form copper chloride?
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