how was chem p11...

[ivorydale]

so guyz, how did chem p11 treat you?

 

[libra94]

it was good Alhumdulillah!! how abt u??

 

[wonderland]

libra94 what did u get for no of chiral centre one penta something

 

[wonderland]

libra94 what about the a volume of hydrochloric acid..... the aluminum one..

 

[libra94]

oh tht was a tricky one, bt i still got that, it was C! 30cm^3
lol we r nt supposed to discuss the ppr before 24 hrs

 

[wonderland]

libr94 , it all fine do not worry ...everything is under the control .. however i got 60cm3 since of the fact that we have to balance the equation. if you want i can explain it..

 

[libra94]

wonderland, yes i balanced it too, and i got 30cm^3 :/

 

[sl0wDowN2]

i also got 30...

 

[libra94]

high five!!

 

[wonderland]

PERHAPS Al2O3 + 6 HCI -----> 2AlCl3 + 3 H2O....6 MOLES = 60cm3
since gave 0.200 mOle of AL EQUAL TO 10CM3 :Yahoo!:

 

[sl0wDowN2]

<<<<<COMMENT REMOVED>>>>>>>>>

 

[libra94]

nooooooooooooooo
i got the mole number as 0.06, and then we had the concentration of HCl
which was 2!
so vol=mole/conc
=====0.06/2 = 0.03 dm^3
since the answers were in cm^3 we multiply by 1000, to get 30cm^3!!

 

[sl0wDowN2]

doesnt matter how you get the answer, as long as you get it

 

[Saturation]

even I got 30

 

[sl0wDowN2]

exactly!

 

[Saturation]

Ok, this qs is KILLING ME, what's the pH of CaO qs?

 

[sl0wDowN2]

it should be above 10, koz im sure Mg0 is 9-11 when it reacts with water, and solubility increases down the group therefore CaO will have a higher pH

 

[Saturation]

THANK YOU! I thought the same too!

 

[sl0wDowN2]

which question was that :?

 

[blablabla]

evn i got 60 as the answer fr which ur getting 30 :%)