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Physics, Chemistry and Biology: Post your doubts here!

The_Boss

The_Boss

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Muaaz Iqbal said:
View attachment 53517 View attachment 53518 View attachment 53519
Part G and H I'm really facing Problem in Titration
Click to expand...
Titration either requires u to know the equation with formula and use moles or do simple arithmetic calculation Since we dont know the reactants we use arithmetic approach.
As the question says that volume of HCl used was to react with half of T and full of S in experiment 1
So now make an equation in terms of s and t
S+0.5tT= 16.8
Now second part says that half of T reacted with full volume so create another equation:
0.5T=8.4
Now solve them simultaneously and u get the answer.
 
Mr.Physics

Mr.Physics

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The_Boss said:
Titration either requires u to know the equation with formula and use moles or do simple arithmetic calculation Since we dont know the reactants we use arithmetic approach.
As the question says that volume of HCl used was to react with half of T and full of S in experiment 1
So now make an equation in terms of s and t
S+0.5tT= 16.8
Now second part says that half of T reacted with full volume so create another equation:
0.5T=8.4
Now solve them simultaneously and u get the answer.
Click to expand...
LOL I did the same but it's wrong !! See the markscheme !
 
Mr.Physics

Mr.Physics

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Muaaz Iqbal said:
I not gonna lie i got 44 because of titration and the last question
Click to expand...
Lol last question wo nuts wala ?? Thats easy man !! You should have same volume of water and then measure its initial temp. Then burn the nut and put the tube exactly on its top . Heat for 10 min and then measure final temp. of water. Calculate the increase in temp. and compare the results for all the nuts !
 
The_Boss

The_Boss

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Mr.Physics said:
LOL I did the same but it's wrong !! See the markscheme !
Click to expand...
Mate u high its correct.
See from second equation u get that T equalls 16.8
(t/0.5)
So put this on one and u get S easily.
s+(16.8*0.5)=16.8
s+8.4=16.8
s=16.8-8.4
s=8.4
Taadaa S=8.4cm3 and T= 16.8cm3
 

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Muaaz Iqbal

Muaaz Iqbal

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Mr.Physics said:
Lol last question wo nuts wala ?? Thats easy man !! You should have same volume of water and then measure its initial temp. Then burn the nut and put the tube exactly on its top . Heat for 10 min and then measure final temp. of water. Calculate the increase in temp. and compare the results for all the nuts !
Click to expand...
Us ki Baat nhi kar rha that was the Easiest one I'm talking about OCT NOV 14
 
Saad the Paki

Saad the Paki

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My god..! Part (f)(iii) seems impossible..!
Its w13 p61
 

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