Chemistry unit 1 6CH01 Discussion! :)

[abdul aziz123]

arrows were downward ! "

 

[chathumus]

arrows were downward ! "

it has to be... i dunno! :/ Cause, ok, see, basically they put three spaces in the box underneath which was surely for 2NaCl CO2 and H2O and then the NaCo3 would also react with HCl to give those products. So both arrows down. And like the delta H on the left hand side was twice as much if i'm not mistaken cause there were two moles of HCl or something so i multiplied that del. H by 2...

 

[Manasa]

the first; Sereljjendkje whatever is lower because it has a lower proton number so the attraction to the positive nucleas is lower and radius is larger and stuff. So its easier to remove.
I think for K or something I said the shielding effect increases because its in a new subshell.. plus the positive nuclear attraction is lower blahblah

pheewww!!! wrote the same thing!!

both arrows were downwards yeah? please tell me yes? :O

i put up firstly but then i put it down...

it was a simple hess's law diagram so up

sureee??? :O

 

[Manasa]

arrows were downward ! "

thank god!!!!!!!!!!

it has to be... i dunno! :/ Cause, ok, see, basically they put three spaces in the box underneath which was surely for NaCl 2CO2 and H2O and then the NaCo3 would also react with HCl to give those products. So both arrows down. And like the delta H on the left hand side was twice as much if i'm not mistaken cause there were two moles of HCl or something so i multiplied that del. H by 2...

well gonna lose 1 mark i guess cuz i didnt write HCl... :/

 

[DC1313]

it has to be... i dunno! :/ Cause, ok, see, basically they put three spaces in the box underneath which was surely for NaCl 2CO2 and H2O and then the NaCo3 would also react with HCl to give those products. So both arrows down. And like the delta H on the left hand side was twice as much if i'm not mistaken cause there were two moles of HCl or something so i multiplied that del. H by 2...

yes they should be downwards. it was sodiumhydrogencarbonate with HCl and sodium carbonate with HCl, both react to give NaCl and CO2 and H2O. Both arrows should point from reactants to products so both should be downwards.

 

[Manasa]

yes they should be downwards. it was sodiumhydrogencarbonate with HCl and sodium carbonate with HCl, both react to give NaCl and CO2 and H2O. Both arrows should point from reactants to products so both should be downwards.

omg!!!!!!! this time i was right!!!! i put it down in the end!!!!

 

[chathumus]

did you

yes they should be downwards. it was sodiumhydrogencarbonate with HCl and sodium carbonate with HCl, both react to give NaCl and CO2 and H2O. Both arrows should point from reactants to products so both should be downwards.

did you multiply the Delta H by 2? for NaHCO3 + HCl reaction in the hess's c.?

 

[Manasa]

did you
did you multiply the Delta H by 2? for NaHCO3 + HCl reaction in the hess's c.?

i diddd!!!!!! hope its right!! :/

 

[abdul aziz123]

mcqs were hard :/ what did u guys chose for the one which harms the skin whuch rays?
the lts mcq was it A?

 

[cardude456]

mcqs were hard :/ what did u guys chose for the one which harms the skin whuch rays?
the lts mcq was it A?

UV

 

[Manasa]

mcqs were hard :/ what did u guys chose for the one which harms the skin whuch rays?
the lts mcq was it A?

i said ultraviolet!...

 

[tawsif kaium]

mcqs were hard :/ what did u guys chose for the one which harms the skin whuch rays?
the lts mcq was it A?

uv may be

 

[chathumus]

I

uv may be

it is UV

 

[tawsif kaium]

what diagram did u guys drew in 22.b???

 

[cardude456]

what diagram did u guys drew in 22.b???

What was the question....?

 

[abdul aziz123]

what about the ast mcq?? mean bind enthalpy i chose A? and managanate one?

 

[cardude456]

what about the ast mcq?? mean bind enthalpy i chose A? and managanate one?

yh......even i chose A
For the manganate i chose the purple colour moves toward positive terminal hope its right!!!

 

[chathumus]

what about the ast mcq?? mean bind enthalpy i chose A? and managanate one?

Said it was the 1/4 thing. (the balancing was 1/4 CH4) I dunno? :/

 

[DC1313]

did you
did you multiply the Delta H by 2? for NaHCO3 + HCl reaction in the hess's c.?

yeah i multiplied that one by 2

 

[tawsif kaium]

what about the ast mcq?? mean bind enthalpy i chose A? and managanate one?

manganate one is that purple color in positive electrode