Chemistry P6 18/5/010

[$H00t!N& $t@r]

i have a question....
you know when they say: "Draw 4 graphs..."
                                    "Draw a smooth line graph"
                                    "Draw a smooth curve
 How do you draw them. i mean is it a free-hand drawing or do you join point to point using straight lines?
And when they say for example: Sketch lines on the grid to show the predicted results if Experiment 2 were repeated using: i) larger pieces of magnesium" how do you draw it? do u just randomly draw a line below the original curve or do you plot points and then join them??

[WARRIOR]

i have a question....
you know when they say: "Draw 4 graphs..."
                                    "Draw a smooth line graph"
                                    "Draw a smooth curve
 How do you draw them. i mean is it a free-hand drawing or do you join point to point using straight lines?
And when they say for example: Sketch lines on the grid to show the predicted results if Experiment 2 were repeated using: i) larger pieces of magnesium" how do you draw it? do u just randomly draw a line below the original curve or do you plot points and then join them??

give me questions on past papers ill help you answer themm ..caz the graphs vary..

[DEGO]

CAN ANY ONE WRITE DOWN THE EXPERIMENTAL FINE TOUCHES PLS   like y used ceramic wool..... these small things

[red_911]

hey plzz tell if sodium hydroxide reacts with magnesium ? reason also...

[$H00t!N& $t@r]

give me questions on past papers ill help you answer themm ..caz the graphs vary..

you said it varies but how do you know which to choose
ok an example...p6 2009 O/N q6a

[WARRIOR]

hey plzz tell if sodium hydroxide reacts with magnesium ? reason also...

metals dont react with alkalis..

[WARRIOR]

you said it varies but how do you know which to choose
ok an example...p6 2009 O/N q6a

in this case.. it is lower temperature. so the reaction is slower .

therefore.. you have to draw the line above the plotted line ? why?

well it has to be slower so..if u draw it above and check a point for example at 1 minutes..the mass decreases by less amount


but if u draw it below adn check a point ..the mass will decrease by more amount..understand?

[$H00t!N& $t@r]

in this case.. it is lower temperature. so the reaction is slower .

therefore.. you have to draw the line above the plotted line ? why?

well it has to be slower so..if u draw it above and check a point for example at 1 minutes..the mass decreases by less amount


but if u draw it below adn check a point ..the mass will decrease by more amount..understand?

i dont understand how??? how can you tell diff in mass. do you plot points when drawing the secod curve or do you draw another curve below the first curve anyhow, with no particular order?

[WARRIOR]

look

just draw another curve the same way that the first one is draw

  ---------------------------------
                                                l
                                                l
                                                l
                                                l
                                                l
                                      this is 1 minute..

now do that and  the first curve shows 178 grams

if u do the same thing wiht the seconde curve which u draw above the first

it will be more than 178 grams ..it can be anywher above ..just shows wht happens whn teh temp is lower

[Ghost Of Highbury]

i dont understand how??? how can you tell diff in mass. do you plot points when drawing the secod curve or do you draw another curve below the first curve anyhow, with no particular order?

Just roughly draw the curve above the previous curve. This is because as the temp. is lower , the reaction is slower meaning HCl and CaCO3 will react slower. Thus, the mass of the contents will decrease slowly.

For e.g At, a specific time the mass of the contents will be higher than that in the previous curve.

[$H00t!N& $t@r]

in the original curve 1min= 178g right?
if i draw a curve above it, i get 1min=182g
isnt that like an increase in the rate of reaction cz more is produced in 1 min???

[Ghost Of Highbury]

More isnt produced in 1 minute. More is "LEFT" in the beaker in 1 minute.

[WARRIOR]

in the original curve 1min= 178g right?
if i draw a curve above it, i get 1min=182g
isnt that like an increase in the rate of reaction cz more is produced in 1 min???

subtract the mass at 0 form the masses you find ..u will realise that there is more mass left

like aadii said

[$H00t!N& $t@r]

ooooooooooooo  i seeeeeeee. oops dint read the question properly..   Thanks a lot guyssss!!!

[WARRIOR]

ooooooooooooo  i seeeeeeee. oops dint read the question properly..   Thanks a lot guyssss!!!

lol np

now u kno wht to do next time! any more questions?