Chemistry: Post your doubts here!

[iKhaled]

ch
checked it.....zero idea:S

alright..thanks for lookin though what paper u did today? 11 or 12?

 

[Tazyeen K]

do

u have skype?

sorry, don use skype.

 

[iKhaled]

sorry, don use skype.

hmmm...if we extend both lines it will be an X ?

 

[Tazyeen K]

hmmm...if we extend both lines it will be an X ?

ya, if you extend more then the point of intersection!!

 

[iKhaled]

ya, if you extend more then the point of intersection!!

i have got it know thanks did u do paper 12 or 11 today?

 

[Soldier313]

alright..thanks for lookin though what paper u did today? 11 or 12?

u r welcome.....did paper 11

 

[iKhaled]

u r welcome.....did paper 11

i did 11 too..was it rape for u?

 

[Tazyeen K]

i have got it know thanks did u do paper 12 or 11 today?

paper 12

 

[Soldier313]

i did 11 too..was it rape for u?

it was okay alhamdulillah......just praying for the best now

 

[iKhaled]

it was okay alhamdulillah......just praying for the best now

have u got skype bro?

 

[iKhaled]

hopefully everyone gets a good grade in chemistry overall, may god be with us and accept all our prayers amin..isa

 

[Soldier313]

nah n m not a bro:/

 

[Tazyeen K]

nah n m not a bro:/

Lol

 

[iKhaled]

nah n m not a bro:/

oops i am sorry haha :$

 

[Soldier313]

oops i am sorry haha :$

no p

 

[Tazyeen K]

what do we do if it says to the nearest second on a stopwatch??

Round it up to a whole number.

 

[PhoenixAsh12]

For enthalpy experiments, use insulating material, and use an electronic thermometer that takes more accurate readings.
For titration, take multiple titration readings, and if there's anything interfering with the titration, get rid of it somehow (by heating, or filtering if it is a solid, etc...)
For salt analysis there is the most. If there is a color change involved, use a colorometer instead of eyes. If there is a gas produced, use a white background to notice it, and note the smell. If there is heating involved, make sure no heat is lost, etc... You can even make up your own.

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What does an amorphous solid look like? Will we ever be given one, or will we always be given crystalline solids to identify?

Thank you

 

[farhan143]

can any 1 explain me what is a rough titration ??

 

[aliya_zad]

can any 1 explain me what is a rough titration ??

Thats when U do a titration by letting the liquid from a burette through 1cm3 by 1cm3..and where u observe a colour change is your rough estimate..
u then go on with ur second titration..and suppose ur rough estimate was 28cm3 or somethin..u then let the solution flow through till around 25 and then do it drop wise to determine the correct end point!!

Basically rough titration gives u a rough estimate!!

 

[uberleet]

if you want to save time then in the first titration attempt spend a little more time and measure exactly. Then just put a little higher value for rough titration and for accurate titrations 0.5 cm^3 up or down from exact. E.g If you get 23.5 first time then in rough you could use the value 24.2 and then in 1 st 2nd accurate titration you can write 23.50 and 23.00. Thats what I did today and still missed around 5 marks :/