Chemistry paper 6 HELPPPPP

[L-Girl]

June 2005, Question 4, b (iii)
June 2008, Question 4, e (iii)

how should I know which solution is more concentrated?
it's so confusing

 

[L-Girl]

it's a frequently asked question, something about the concentrations of the solutions..

 

[MNU]

for june 2005 , to neutralise the same conc and vol of calcium hydroxide , less vol of M was used so it must be more concentrated!

 

[L-Girl]

for june 2005 , to neutralise the same conc and vol of calcium hydroxide , less vol of M was used so it must be more concentrated!

thank you

 

[thats_me]

June 2005, Question 4, b (iii)
June 2008, Question 4, e (iii)

how should I know which solution is more concentrated?
it's so confusing

june 08 sol A is more conc and stronger than sol B

 

[MNU]

and the same goes for the 2nd one to react with the solutions, vol of potassium manganate used in 1st expt was more so A must be more concentrated

 

[L-Girl]

so when it is a neutralisation reaction, the smaller volume is the more concentrated one
and if it's not, the bigger volume is the more concentrated one?

 

[MNU]

no the smaller vol will be the more concentrated one!

 

[MNU]

in the 2nd one we do not know the concentration of a and b but we know that for the same concentration of potassium manganate more volume is needed to react witn A so it must be more concentrated

 

[L-Girl]

and if it's a neutralisation reaction, the smaller volume is more concentrated, right?

 

[Kdhash]

The concentration of the HCL in the first experiment is more, because as it has more particles per unit area, not much volume is required.

 

[MNU]

and if it's a neutralisation reaction, the smaller volume is more concentrated, right?

yeah!

 

[L-Girl]

thanks a lot
I needed that help

 

[da7ee7_95]

Does anyone know how to do the last question on every past paper, i always have problems with it. Is there any topic to revise or anything to study for these type of questions from?

 

[Abby ay]

I have the same doubt ^^
& how do we know for the cation & anion test that the reaction wont take place or /no change ??

 

[Beedo]

Does anyone know how to do the last question on every past paper, i always have problems with it. Is there any topic to revise or anything to study for these type of questions from?

same here

 

[kumiko]

what is the volume of one drop using teat pipette? thx.

 

[thats_me]

I have the same doubt ^^
& how do we know for the cation & anion test that the reaction wont take place or /no change ??

u can understand that by reading the question for example if they mention in the question that its ammonium chloride n give the test for sulphate so in the observation u'll write "no change/reaction"

 

[Abby ay]

u can understand that by reading the question for example if they mention in the question that its ammonium chloride n give the test for sulphate so in the observation u'll write "no change/reaction"

okay! thanks