- #1
JimmyRay
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Hi I have just started grade 11 chemistry... We're reviewing from grade nine a bit and in class we did an experiment where we had copper(II) sulfate in a test tube and we heated it, and then let it cool and added water...
Ok well we have to classify this as a physical or chemical change.. but really I can't tell because when its heated it looses its color, and a change of color would be chemical, but then when water is added, its color is back... and it APPEARS to be the same substance...that would mean it's a physical change?
Ive also noticed there arnt many basic websites for chemistry help (stuff like this, physical chemical changes, grade 9-10 review)... I'd like to know if anyone has some...
Any sort of help would be appreciated...
Ok well we have to classify this as a physical or chemical change.. but really I can't tell because when its heated it looses its color, and a change of color would be chemical, but then when water is added, its color is back... and it APPEARS to be the same substance...that would mean it's a physical change?
Ive also noticed there arnt many basic websites for chemistry help (stuff like this, physical chemical changes, grade 9-10 review)... I'd like to know if anyone has some...
Any sort of help would be appreciated...