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Author Topic: Chemistry Help needed!:-(  (Read 13112 times)

Offline godfather93

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Re: Chemistry Help needed!:-(
« Reply #105 on: May 09, 2009, 10:58:39 pm »
but there are more chances of you being right cause according to what Naruto said, he said smooth line curve.
Anyways :D
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Offline Zain-Xa

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Re: Chemistry Help needed!:-(
« Reply #106 on: May 09, 2009, 10:59:36 pm »
lol jus check wid the ms n we'll get it  ;D
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Offline godfather93

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Re: Chemistry Help needed!:-(
« Reply #107 on: May 09, 2009, 11:02:30 pm »
thas why i asked for the question paper. :)
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Offline Naruto

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Re: Chemistry Help needed!:-(
« Reply #108 on: May 09, 2009, 11:04:07 pm »
Extremely sorry by mistake i wrote smooth line curve
actually i wanted to know about smooth line graph
and im doing may/june 2001, question 3 and 5
thanks
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Offline godfather93

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Re: Chemistry Help needed!:-(
« Reply #109 on: May 09, 2009, 11:05:24 pm »
ahhh now that changes things. it can be either a curve or a straight line.
I'll check it and tell you in a minute
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Offline godfather93

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Re: Chemistry Help needed!:-(
« Reply #110 on: May 09, 2009, 11:06:22 pm »
i just realised i don't have those papers. Could u upload them?
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Offline Zain-Xa

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Re: Chemistry Help needed!:-(
« Reply #111 on: May 09, 2009, 11:06:39 pm »
well when they say smooth line u do it free hand
straight line --- wid ruler
best fit --- wid ruler

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Offline godfather93

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Re: Chemistry Help needed!:-(
« Reply #112 on: May 09, 2009, 11:08:52 pm »
but when they say smooth line graph, it can be either. I just did the 2003 past paper and i encountered 2 graphs having the exact wording "smooth line graph", one turned out to be a straight line while the other one was curved.
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Offline Zain-Xa

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Re: Chemistry Help needed!:-(
« Reply #113 on: May 09, 2009, 11:11:34 pm »
oook i have 2001 n the answer here issssssss q3 is curve n q5 is a straight line according to wt i did which is checked  :D
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Offline godfather93

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Re: Chemistry Help needed!:-(
« Reply #114 on: May 09, 2009, 11:13:36 pm »
i told you it can be either one!  ;)
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Offline Naruto

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Re: Chemistry Help needed!:-(
« Reply #115 on: May 09, 2009, 11:15:43 pm »
yeah exactly mostly the wording is smooth line graph...so how can we decide wat to do
like in may/june 2000 it was smooth line graph and i made it a straight line
so this is really confusing...wat to do :-\
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Offline Naruto

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Re: Chemistry Help needed!:-(
« Reply #116 on: May 09, 2009, 11:18:23 pm »
Well i dont think it can be either because in the markscheme it is always mentioned wat type of graph should be drawn
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Offline Zain-Xa

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Re: Chemistry Help needed!:-(
« Reply #117 on: May 09, 2009, 11:19:31 pm »
in may june 2000 its a curve no ruler i think if they mention smooth it means u dnt have to use a ruler as mentioned in may june 2001 q 5 it only says draw a graph of these results so i used a ruler whereas in q3 they mentioned smooth line......
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What can I do, to make it right
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I'll be strong.. I'll be wrong.. all the love goes on.. Oh im just a girl tryna find a place in this worLD..  Taylor swift <3

Offline Zain-Xa

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Re: Chemistry Help needed!:-(
« Reply #118 on: May 09, 2009, 11:22:51 pm »
In chemistry, when plotting a graph of reaction rate, you must draw a curve of best fit through your prints. Lines drawn with a ruler from point to point will not get a mark

this is frm the examiners tips for chem ..... its there in the topic revision checklist
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What can I do, to make it right
Falling so hard so fast this time
What did I say, what did you do?
How did I fall in love with you?


zzzzzZZZZZZzzzzzzzzz

I'll be strong.. I'll be wrong.. all the love goes on.. Oh im just a girl tryna find a place in this worLD..  Taylor swift <3

Offline godfather93

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Re: Chemistry Help needed!:-(
« Reply #119 on: May 09, 2009, 11:27:00 pm »
basically when the question has something to do with reaction rate (for example a graph showing the volume of oxygen collected over time taken), the graph will be a curve because every reaction starts, continues for a while, slows down and then stops. a straight line is drawn either for scatter graphs (definitely) or for some line graphs (where time is not one of the variables).
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