Chemistry help ASAP!

[Billy123]

Summer 2009 Chemistry Paper 32.
Can anyone teach me the Question Part B in Page number 7? Please help as soon as possible!

 

[JOEJOE]

Water behaves as a base because its a proton acceptor ( it took an proton from the acid )

For HCL it tells us that its a strong acid because it has completely ionised!!
For HF it tells us that its a weak acid because it has partially ionised!!!

Since HCL ionises more it will have a lower pH (more H ions)
HF will have less!!!!

 

[Billy123]

Check again! Thats not the Q! 2009 Paper 32 Chemistry summer! Please help again!

 

[Manobilly]

no. of moles of T nitrate: no. of moles of sodium phosphate
0.012 : 0.008
3 : 2
formula of T phosphate-T3(PO4)2

 

[Billy123]

How do you get 0.012 and 0.008???

 

[Billy123]

In here: http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s09_qp_3.pdf

The second varient! Some people getting confused! Please explain in detail how to get 0.008 and 0.012

 

[Billy123]

Comon someone help fast I need to go sleep!

 

[thats_me]

Comon someone help fast I need to go sleep!

Here
T(NO3)x + Na3PO4 ----> T3(PO4)x + NaNO3
ratio given: 18 :6 =3:1(6 frm graph wen it completely reacts)
Now balance the equation according to the ratio
3T(NO3) +Na3PO4 ----> T3PO4 +3NaNO3
so T3PO4

 

[Billy123]

Ohh,thanks a lot! Now I understand

 

[thats_me]

Ohh,thanks a lot! Now I understand

np