Feb 1 2013, 10:58 PM
QUOTE(maximR @ Feb 1 2013, 02:23 PM)
Plus :
2011 SPM Paper 3 , same experiment ( or was it about concentration ? ) , a question asks :
State one observation .
The mark scheme in the past year questions book states :
Yellow precipitate is formed .
I thought it should be 'the time taken for the mark 'X' to disappear in Experiment 1 is the shortest' because we can look at the time on the stopwatch , but not the colour of the precipitate ?
I think the book's answer is acceptable.2011 SPM Paper 3 , same experiment ( or was it about concentration ? ) , a question asks :
State one observation .
The mark scheme in the past year questions book states :
Yellow precipitate is formed .
I thought it should be 'the time taken for the mark 'X' to disappear in Experiment 1 is the shortest' because we can look at the time on the stopwatch , but not the colour of the precipitate ?
What do you mean by you can't observe the colour of the precipitate? Can't we? Do enlighten me.
This post has been edited by blueflame: Feb 1 2013, 10:59 PM
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