Chemistry: Post your doubts here!

[mr dam bhai]

can someone explain me properly how to draw titration curves

 

[Bba321]

It would be in the 2 and 6 position with respect to OH.

OH is a stronger activating group compared to alkyl groups, there is also the issue of the steric hindrance of the large alkyl group.

Ok thnxx

 

[princessnoor]

Plz someone help me with this question
N11-43 Q3 e(iv)

 

[Bba321]

How to draw structures like these? Nov/14/41

 

[KWIKIW]

Even i want notes on NMR

 

[KWIKIW]

Can someone pls send me notes on NMR?

 

[shazmina]

http://maxpapers.com/wp-content/uploads/2012/11/9701_w12_qp_41.pdf
Can any1 help me with Question no 1 Part b (vi) .... i dont get from where they are getting 0.045 mol of Cu...
Please help .....

 

[farhan980]

can someone help me with this ? thanks in advance

 

[danial 234]

http://maxpapers.com/wp-content/uploads/2012/11/9701_w12_qp_41.pdf
Can any1 help me with Question no 1 Part b (vi) .... i dont get from where they are getting 0.045 mol of Cu...
Please help .....

moles of Fe3+ in 100 cm3 of partially used solution=0.15-0.06=0.09 moles
As two moles of Fe3+ react with one mole of Cu.
So, 0.09 moles of Fe3+ will react with 0.045 moles of Cu.
Mass of Cu=Moles * Ar

 

[Awesome12]

Why is option 1 only correct?

 

[fantastic girl]

Assalamu Alaikum.
http://www.studentbounty.com/pastpa.../Chemistry (9701)/2010 Nov/9701_w10_qp_43.pdf
Can someone plzz tell me how to do Q2 c :'(
i just did till finding concentration of copper.....i dont get the last step :/ how can mass become the % ? :S

 

[princessnoor]

How to draw structures like these? Nov/14/41

they are very simple look in the marking scheme
In pcl4+ 4 covalent bonds of cl with p and + charge on p
And 6 covalent bonds of p with cl with - charge on p since it had gained electrons

 

[shazmina]

moles of Fe3+ in 100 cm3 of partially used solution=0.15-0.06=0.09 moles
As two moles of Fe3+ react with one mole of Cu.
So, 0.09 moles of Fe3+ will react with 0.045 moles of Cu.
Mass of Cu=Moles * Ar

Thank you soo much Daiyya broh
JazakAllah khairan

 

[NIM]

Guyzz!! How was Chem paper 42???

 

[princessnoor]

Guyzz!! How was Chem paper 42???

A little hard

 

[_Ahmad]

can anyone please explain Q2 (e) of this paper
http://onlineexamhelp.com/wp-content/uploads/2015/02/9701_w14_qp_52.pdf

 

[forever_chocoholic]

what are construction lines?

 

[forever_chocoholic]

can anyone please explain Q2 (e) of this paper
http://onlineexamhelp.com/wp-content/uploads/2015/02/9701_w14_qp_52.pdf

(
( 2x27/( 2x27 + 3x16) ) x 1.50 = 0.794

 

[_Ahmad]

(
( 2x27/( 2x27 + 3x16) ) x 1.50 = 0.794

Can you please elaborate it and explain part (f) too

 

[NIM]

A little hard

2nd last question was kinda tricky!!