OMG CHEMISTRY UNIT 1 PAPER!!!!!!!!!!!!

[tanzina500]

I wrote the same but some people said it should be white crystals cuz they have no color ..

I wrote it white..because Group 1 metal compounds are white!

 

[shoaeb]

it was white.

 

[svenas]

I wrote for type of reaction.....free radical formation...is it ok?

 

[Mewan95]

I wrote white as well..It was a wild guess though.

 

[Mewan95]

I wrote for type of reaction.....free radical formation...is it ok?

maybe it is..cz i think free radical substitution is the answer..according to the text book.

 

[tanzina500]

Okay see do you know how to calculate the enthalpy change using the experemental data values ?
Enthalpy change = energy transferred/no. of moles
The no. of moles was five times of the previous moles that were used there fore : Delta T x massx SHC / 5
which simplifies to 1/5 x delta T
Understood ?
Anyone has the idea of the grade boundaries , this was my first time giving an edexcel paper so I am not sure of the whole grade boundary procedure ! thanks
Btw how was your paper ?

I know its no point to argue now with the answer..but I cant stop myself
moles=concentration x volume...since concentration is same so moles directly proportional to volume.since volume increased 5 times so mole will increase 5times.
enthalpy change=(SHC x mass x Delta T)/no.of moles...if u rearrange this eqn..No.of moles=(SHC x MASS x Delta T)/enthalpy change so moles proportional to Delta T.Since moles increased 5times so it will be 5 Delta T!!

 

[shoaeb]

i guess you guys are too confused with the answer for the delta T..well this is my gay theory
first they used 25 cm..and it was delta T..but then they used 50 cm..the solution is more dilute now..it was more concentrated before..so i think either the answer is 1/5T (which i marked first) or just delta T..(which i marked as the final answer)

 

[OrlandoBloom<3]

AHHHHHHHHHHHHHHHHHH why did I write purple

 

[sunnyclone]

AHHHHHHHHHHHHHHHHHH why did I write purple

why did u write purple?....colored only if it has a transition metal

 

[aniekan]

LOL..THAT ESCALATED QUICKLY!
i wrote decreases down the group cause the atomic number increases..more shielding..so there is less force of attraction between the new electron and the nucleus..
what was the element with the highest ionization energy?

pretty much like Ionization stuff xD

 

[aniekan]

maybe it is..cz i think free radical substitution is the answer..according to the text book.

Free radical substitution ? I doubt that cus it asked for step 1 : I wrote xD-- free radical Homolytic fission

Well I don't know which is right or wrong xD

 

[aniekan]

I know its no point to argue now with the answer..but I cant stop myself
moles=concentration x volume...since concentration is same so moles directly proportional to volume.since volume increased 5 times so mole will increase 5times.
enthalpy change=(SHC x mass x Delta T)/no.of moles...if u rearrange this eqn..No.of moles=(SHC x MASS x Delta T)/enthalpy change so moles proportional to Delta T.Since moles increased 5times so it will be 5 Delta T!!

exactly what i did . I agree with this

 

[aniekan]

I wrote since 1 mole of the Al compound was reacted with 2 moles of acid to form 1 mole of the product..since there is and extra mole of acid left to use, we can show that the acid was added in excess..it makes sense..dunno if its correct though.

I wrote something similar to this ; In the first equation Al was(solid) but it disappeared xD--so my first suggestion was --Solid disappears xD
Also from the first equation H2 was gas , so gas is produced ...so I wrote ----no gas is formed xD-----kinda make sense tho xD

 

[aniekan]

Hahaha i swear i had a feeling that Edexcel's gna change the trend of asking Qs -.-" u knw, diff styles
i need to meet this examiner x_x"

I need to tell him thank you for ruining our-lives xD

 

[Afraah]

I need to tell him thank you for ruining our-lives xD

Buahahahahaah im coming with u :3

 

[Afraah]

Guys guys guys guys guys guys guys one Q.. what in the name of God was the next element wen Nitrogen and some kinda "e" thingy broke down, u knw the question bout Hydrogen isotopes?
hhahaha i wrote CARBON :3

 

[aniekan]

Guys guys guys guys guys guys guys one Q.. what in the name of God was the next element wen Nitrogen and some kinda "e" thingy broke down, u knw the question bout Hydrogen isotopes?
hhahaha i wrote CARBON :3

yeah you are right C -12 with 6 protons.

 

[Afraah]

yeah you are right C -12 with 6 protons.

LIKE A BOSS OMGGG LUCKY GUESS HERE

 

[aniekan]

LIKE A BOSS OMGGG LUCKY GUESS HERE

hahah I told you : " you are a genius" no doubt !

 

[Afraah]

hahah I told you : " you are a genius" no doubt !

hahahah awh thankss ur genius urself too no doubt in that ^.^