Solving Chemistry Doubts Now :)

[SB29597]

Guys post your doubts- I'll try solving them!!! I WILL BE SO HAPPY TOMORROW!!! (unofficial end of IGCSE's)

 

[snoonono]

I wanna know the equations for chemical equations, what they are, how to use, and when to use!! would be rly grateful

 

[wooowooowoo]

Finally someone posting about ending of IG!
Yes, unofficial end! Are you writing your P1's after 2 weeks too?

 

[snoonono]

Finally someone posting about ending of IG!
Yes, unofficial end! Are you writing your P1's after 2 weeks too?

I KNOW right, am doing ppr 1 2 weeks after

 

[Lost_Life]

GOT A QUESTION! COULD YOU EXPLAIN TO ME IONIC EQUATIONS IN ELECTROLYSIS??!!

 

[snoonono]

GOT A QUESTION! COULD YOU EXPLAIN TO ME IONIC EQUATIONS IN ELECTROLYSIS??!!

try this
http://www.gcsescience.com/ex4.htm

 

[SB29597]

Finally someone posting about ending of IG!
Yes, unofficial end! Are you writing your P1's after 2 weeks too?

Yess. YOu know i was swearing so much because they gave us a twelve day break for P1 >.<
But I'm over the moon because they;ll end tomm

 

[snoonono]

Yess. YOu know i was swearing so much because they gave us a twelve day break for P1 >.<
But I'm over the moon because they;ll end tomm

HAHAHHA so did i!!!!!!!!!!!!!!!

 

[SB29597]

I wanna know the equations for chemical equations, what they are, how to use, and when to use!! would be rly grateful

chemical equations form the basis of Chem. they basically sum up what happened in the whole reactions using only symbols. In the paper you are usually asked to write an equation but if its a question with high marks its always good to include an equation. two tips- ALWAYS check whether they want word eq or symbolic eq and ALWAYS BALANCE YOUR EQUATION.
I hope I've answered your question, if not feel free to ask again
Best of luck!

 

[SB29597]

GOT A QUESTION! COULD YOU EXPLAIN TO ME IONIC EQUATIONS IN ELECTROLYSIS??!!

Ionic equations in electrolysis sum up what happened at each electrode. So you have to show the loss and gain of electrons that takes place to give a specific product. The link snoonono gave may help
GOod Luck!!

 

[snoonono]

Ionic equations in electrolysis sum up what happened at each electrode. So you have to show the loss and gain of electrons that takes place to give a specific product. The link snoonono gave may help
GOod Luck!!

he he ur welcome , and good luck to u 2

 

[Lost_Life]

catalytic converter/

 

[SB29597]

catalytic converter/

Catalytic converter is used to purify vehicular exhaust. It uses a platinum rhodium catalyst which is in the form of a honeycombed surface to increase surface area. It helps to finish the combustion of hydrocarbons. CO+O2 -> CO2. And hold on, theres probably more- I'll get my notes

 

[SB29597]

Catalytic converter is used to purify vehicular exhaust. It uses a platinum rhodium catalyst which is in the form of a honeycombed surface to increase surface area. It helps to finish the combustion of hydrocarbons. CO+O2 -> CO2. And hold on, theres probably more- I'll get my notes

Reactions in the converter
2CO+O2=2CO2
2NO+2CO= N2+2CO2
2NO=N2+O2
Hydrocarbon+ O2= CO2 + H2O

Hope this helps!!

 

[SB29597]

catalytic converter/

Lost_Life question answered

 

[ygyh45]

GOT A QUESTION! COULD YOU EXPLAIN TO ME IONIC EQUATIONS IN ELECTROLYSIS??!!

one thing u need to remember :
always reduction at cathode and oxidation at anode
so wen thy ask for equation at cathode u write the ion + no. of electrons gained to give u the normal state
anode u write the normal -----> ion + electrons
wat i mean by normal is lyk for copper its Cu while an ion is Cu 2+

 

[snoonono]

(a) The element germanium has a diamond-type structure. Describe the structure of
germanium. A diagram is acceptable.
guys how do we solve such questions... can some1 add a photo of the way of solving????

 

[wooowooowoo]

(a) The element germanium has a diamond-type structure. Describe the structure of
germanium. A diagram is acceptable.
guys how do we solve such questions... can some1 add a photo of the way of solving????

Draw the structure of Diamond but replace carbon with Germanium.
Each carbon is bonded to 4 other carbon in a tetrahedral shape to form diamond.
In this structure, each germanium will be bonded to 4 other germanium. Check ms and let me know the correct ans

 

[snoonono]

Draw the structure of Diamond but replace carbon with Germanium.
Each carbon is bonded to 4 other carbon in a tetrahedral shape to form diamond.
In this structure, each germanium will be bonded to 4 other germanium. Check ms and let me know the correct ans

thxxxxxxxxxxx, its correct but if we just draw is thata full mark for the whole question? or do we need to write each Gr atom is bounded by 4 others?

 

[imperial]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w10_qp_33.pdf
3c (iv) WHY THE V IS 0.6 EXACTLY? HOW DO WE KNOW THE EXACT VALUE? I KNOW IT SHOULD BE BETWEEN BUT THE MARK SCHEME SAYS 0.6

edit: sry caps