CHEMISTRY PAPER 3- HELP

[yousef0074]

MAY/JUNE 2010 PAPER 31 QUESTION 3 PART D, WHY IS CONCENTRATION NOT ACCEPTABLE AS AN ANSWER

http://www.xtremepapers.me/CIE/Cambridg ... _qp_31.pdf

http://www.xtremepapers.me/CIE/Cambridg ... _ms_31.pdf

http://www.xtremepapers.me/CIE/Cambridg ... s10_er.pdf

ANY HELP WOULD BE APPRECIATED

 

[gary221]

MAY/JUNE 2010 PAPER 31 QUESTION 3 PART D, WHY IS CONCENTRATION NOT ACCEPTABLE AS AN ANSWER

http://www.xtremepapers.me/CIE/Cambridg ... _qp_31.pdf

http://www.xtremepapers.me/CIE/Cambridg ... _ms_31.pdf

http://www.xtremepapers.me/CIE/Cambridg ... s10_er.pdf

ANY HELP WOULD BE APPRECIATED

im not sure but maybe bcoz its not directly related!!
i mean maybe increasing the concentration of the acid will not hve any effect in inceasing the rate bcoz Mg is the limiting reagent!!

 

[She7taman]

im not sure but maybe bcoz its not directly related!!
i mean maybe increasing the concentration of the acid will not hve any effect in inceasing the rate bcoz Mg is the limiting reagent!!

This ^

The acid is in excess. Increasing its concentration will make no difference. It's common sense.

Also, please stop typing in all caps, it's annoying.

 

[gary221]

yup thts wht i thought !!

 

[yousef0074]

but i saw examples in many books where increasing the concentration of the acid that is in excess, increased the rate of the reaction producing same final volume of the gas

 

[gary221]

but i saw examples in many books where increasing the concentration of the acid that is in excess, increased the rate of the reaction producing same final volume of the gas

which egs????

 

[brainiac]

bro if u just pay a little attention to the question u will notice a sntence ( acid in excess) this means there is already sufficent acid for the magnesium to react fully ............. this makes it clear that the variables would not contain concentration rather temp, surface area ,or catalyst ..................... hope u got it




GOOD LUCK FOR UR EXAMS :good: :good: :good: :good: :good:

 

[She7taman]

bro if u just pay a little attention to the question u will notice a sntence ( acid in excess) this means there is already sufficent acid for the magnesium to react fully ............. this makes it clear that the variables would not contain concentration rather temp, surface area ,or catalyst ..................... hope u got it




GOOD LUCK FOR UR EXAMS :good: :good: :good: :good: :good:

Redundant don't you think?

You should really read threads fully before posting, the question has already been answered twice.

And to the topic starter, it depends on the individual experiment. Try to find that question you're talking about. If you can't find it, just remember to use common sense, it actually works.

 

[brainiac]

ok, sorry bro i will try to avoid this mistake in future ....................