Chemistry unit 1 6CH01 Discussion! :)

[trsa1995]

So in short my answers:
the mcq of mean enthalpy : was A
iodine soluble: KI
the hydrides: ASH3 and SEH2
smallest atomic radius : krypton
how do u tell if water isnt there: i wrote the crystals maybe dry and colour change from blue to white :S
colour of crystals : blue
percentage yeild: 54.1
percentage uncertainity : 9.01 or 9.09 something
hess law : i got 200 something :/
if crystals turn white for that: ermm to check purity or check if water is present or not :/
for electron density i made TWO SEPERATE STRUCTURES OF ETHENE to show sigma and pie bond IS IT RIGHT??????????

 

[tawsif kaium]

if 19 was the the beginning of section B then all those qstns are worth 60 marks and the multiple choice was 20 marks!

there was question 18...it was 5 marks...last question may be 16 but the rest i need to know

 

[tawsif kaium]

So in short my answers:
the mcq of mean enthalpy : was A
iodine soluble: KI
the hydrides: ASH3 and SEH2
smallest atomic radius : krypton
how do u tell if water isnt there: i wrote the crystals maybe dry and colour change from blue to white :S
colour of crystals : blue
percentage yeild: 54.1
percentage uncertainity : 9.01 or 9.09 something
hess law : i got 200 something :/
if crystals turn white for that: ermm to check purity or check if water is present or not :/
for electron density i made TWO SEPERATE STRUCTURES OF ETHENE to show sigma and pie bond IS IT RIGHT??????????

the electron density one i drew pi and sigma bonds together.....i hope its correct...what about 22.a???

 

[Manasa]

there was question 18...it was 5 marks...last question may be 16 but the rest i need to know

umm ok well,,,, 60-5=55!

 

[Manasa]

the electron density one i drew pi and sigma bonds together.....i hope its correct...what about 22.a???

not sure bout my calcs at all!! ;/

 

[trsa1995]

the electron density one i drew pi and sigma bonds together.....i hope its correct...what about 22.a???

what was that part? cracking one?

 

[Manasa]

So in short my answers:
the mcq of mean enthalpy : was A
iodine soluble: KI
the hydrides: ASH3 and SEH2
smallest atomic radius : krypton
how do u tell if water isnt there: i wrote the crystals maybe dry and colour change from blue to white :S
colour of crystals : blue
percentage yeild: 54.1
percentage uncertainity : 9.01 or 9.09 something
hess law : i got 200 something :/
if crystals turn white for that: ermm to check purity or check if water is present or not :/
for electron density i made TWO SEPERATE STRUCTURES OF ETHENE to show sigma and pie bond IS IT RIGHT??????????

got similar answrs to u for most of the parts!

 

[tawsif kaium]

what was that part? cracking one?

sorry the other diagram....

 

[trsa1995]

sorry the other diagram....

i drew a test tube in which was dodecane, and proclein or aliminium foil pieces, applied heat through a bunsen heater, and a tube carried it to a water bath which had an inverted beaker where the ethene was collected

 

[abdul aziz123]

So in short my answers:
the mcq of mean enthalpy : was A
iodine soluble: KI
the hydrides: ASH3 and SEH2
smallest atomic radius : krypton
how do u tell if water isnt there: i wrote the crystals maybe dry and colour change from blue to white :S
colour of crystals : blue
percentage yeild: 54.1
percentage uncertainity : 9.01 or 9.09 something
hess law : i got 200 something :/
if crystals turn white for that: ermm to check purity or check if water is present or not :/
for electron density i made TWO SEPERATE STRUCTURES OF ETHENE to show sigma and pie bond IS IT RIGHT??????????

two sepertae structures it should be correct !
hess law calcution wrong
smallest atomic radius which qstn?
and crystals turn white to blue and back ! i wrote its a reversible reaction ;/

 

[Manasa]

two sepertae structures it should be correct !
hess law calcution wrong
smallest atomic radius which qstn?
and crystals turn white to blue and back ! i wrote its a reversible reaction ;/

lol i didn calc for hess law.. skippd it...2 sep structurs... got it right!///// small atomic rad dun remembr! crystals got it right xcept for the reasn!

 

[chathumus]

The Hyrdrous/anydrous CuS04 question, for a use of it.. I said to check the purity of water. Is that right? :/

 

[DC1313]

The Hyrdrous/anydrous CuS04 question, for a use of it.. I said to check the purity of water. Is that right? :/

idk i wrote it's to check for the presence of water

 

[cardude456]

The Hyrdrous/anydrous CuS04 question, for a use of it.. I said to check the purity of water. Is that right? :/

Its for the presence..........for purity you have to boil it and if it boils at exactly 100 degrees Celsius......its pure

 

[Manasa]

Its for the presence..........for purity you have to boil it and if it boils at exactly 100 degrees Celsius......its pure

yuuuuuupppppppppppppppppppyyyyyyyyyyy!!!!!!!!!!!

 

[cardude456]

yuuuuuupppppppppppppppppppyyyyyyyyyyy!!!!!!!!!!!

 

[Manasa]

what were the answers for multi choice qstns>>??

 

[cardude456]

what were the answers for multi choice qstns>>??

Dont remember all........

 

[Manasa]

Dont remember all........

lol obviously! wat did u write for the one with X and O ? and the very first qstn with lithium....

 

[Zainkhan]

For Hess Law i got 96.1KJ i think, I think it was x2o3 ( X was 3+) and for the question that said how would we know all water had evaporated i wrote a blue solution will be left :/ ( not sure about this one ) and percentage yield is less than 100 percent because maybe not all water had evaporated/not dried completely