Qualification > Sciences
CHEMISTRY PAPER 1 HERE
sweetest angel:
--- Quote from: Hope on June 11, 2009, 09:15:08 pm ---Could anyone please explain why the answer to November 2008 qn 23 is A?
--- End quote ---
magnesium chloride is ALREADY a salt..thus won't react with anything let it be an acid or not to form anotha salt...thus A where that option has a cross!
sweetsh:
15)a
20)b
29)b
Hope:
I thought about it..and thought so. But, I did a bit of research and found that it could react! That's just too confusing :(
sweetest angel:
--- Quote from: cockyxrocker on June 11, 2009, 09:19:18 pm ---Nov 2008 questions 15,20,29
help!..
--- End quote ---
15) C...if it absorbs 10 from 1000cm^3 then it would absorb twice as much of heat from 500cm^3 since volume is halved!
20)HCL + BaNO3-->HNO3+BACL ....therefore the acidic nitric acid decrease the pH and since barium reacts with chlorine,therfore no precipitate
29)metals donot have 6 in their outa shell and always form ionic compounds thus B
sweetsh:
I can't get this, what's the difference between molten and aqueos?
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