CHEM AND BIO HELP AND TIPS HERE

[Ghost Of Highbury]

Aadi .. always one step ahead .. hey can u tell me how can i been more confidant about my answers ?? like this one for instance ..

when i am confidant the answers go wrong .. :\

The only way you can be confident about your answers if you have all your concepts in the right place. Try to read that IGCSE chem. guide b4 sleeping, thats nuff. YOu dont need tips dude, ur awesome, and im sure ull get  that star in chem

@deadman - Typical volumes are 10, 25, and 50 mL. Alternatively, graduated pipettes are straight-walled, and graduated for different volumes such as 5 mL in 0.5 mL increments.

[The Golden Girl =D]

The only way you can be confident about your answers if you have all your concepts in the right place. Try to read that IGCSE chem. guide b4 sleeping, thats nuff. YOu dont need tips dude, ur awesome, and im sure ull get  that star in chem

@deadman - Typical volumes are 10, 25, and 50 mL. Alternatively, graduated pipettes are straight-walled, and graduated for different volumes such as 5 mL in 0.5 mL increments.

i read what u wrote  and i'm just wondering can u give me the link 

[Ghost Of Highbury]

i read what u wrote  and i'm just wondering can u give me the link 

what link?

[The Golden Girl =D]

what link?

to the IGCSE chem guide thingy

[Ghost Of Highbury]

to the IGCSE chem guide thingy

its a book

[Vin]

Thanks Aadi .. r u talking about this guide ?? I still hav to do French .. havnt touched it since morning !

[Vin]

its a book

Oh tht ! tht is more than enough .. sad i dont hav the whole book. :\ jus a couple of pages photocopies ..

[the_grim_reaper]

typical ones in a lab 10, 25, and 50 ml. (at least in my school lab) y do you ask ??

Thanks a lot. No nothing really. Just random stuff .

[Vin]

Thanks a lot. No nothing really. Just random stuff .

oh ok .. there is something known as teat pipette .. or dropper .. which is smaller and less accurate than a pipette you obvi. might know this ..

[Helium]

 Some body prove it's A.(plz)

It's unsaturated because it has a double bond, but why form neutral solution
in water. It has OH group which is alcohols.

[NidZ- Hero]

Thanks Aadi .. r u talking about this guide ?? I still hav to do French .. havnt touched it since morning !

hey vin dude do u have de guide

[the_grim_reaper]

oh ok .. there is something known as teat pipette .. or dropper .. which is smaller and less accurate than a pipette you obvi. might know this ..

hahaha I do know this. It's the stuff we use to mess around with the lab's chemicals when the teacher is busy ..

Just one final thing (really sorry to disturb today), in oct/nov 01 in question 13, why is it not A (P only)

[Vin]

Some body prove it's A.(plz)

It's unsaturated because it has a double bond, but why form neutral solution
in water. It has OH group which is alcohols.

O/N 2003 CHEM P1 , Q36!
Which compound is unsaturated and forms a neutral solution in water?

A) CH₂OH-CH--CH-CH₂OH
B) CH₂OH-CH₂-CH₂-CH₂OH
C) CO₂H-CH--CH-CO₂H
D) CO₂H-CH₂-CH₂-CO₂H

i get the unsaturated bit.. but how do you know if it's neutral or not?
doesnt the 'OH' group make it ... acidic? :B hehs, explanation neeeeeded svp, (X
 

answer is A .. why because C doesnt make sense to me ! also OH is alcohol and COOH is acid

looooool - uhh but howd you know that alcohols can form neutral solutions in water? 

It is supposed to be neutral .. in fact red litmus paper has an ingredient called "alcohol" .. thts a long story now .. google it if u wanna 

[Helium]

hahaha I do know this. It's the stuff we use to mess around with the lab's chemicals when the teacher is busy ..

Just one final thing (really sorry to disturb today), in oct/nov 01 in question 13, why is it not A (P only)

lol same here, our students act like 9 year old, take the syringes and start spraying water at
each other.

Are u sure the anw is A.
Q)which Group 7 element is produced at which anode.

1 solution has Molten lead(II) bromide. Bromine gas produced at P.

2 solution concentrated hydrochloric acid. Chlorine is supposed to be formed at R.

I think it should be B (P and R)

Or chloride ions dont move in concentrated solutions

[Vin]

hey vin dude do u have de guide

http://thenightdreamer.wordpress.com/2009/11/11/chemistry-guide/