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Physics, Chemistry and Biology: Post your doubts here!

Mr.Physics

Mr.Physics

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It's C guyzz !! It's really easy !! Just a bit tricky !!
Equation : 2C2H2 + 5O2 ----- 4CO2 + 2H2O

Volumes used : 20 cm3 + 500cm3 ------ ? + ?

Volumes actually
reacted : 20 cm3 + 50cm3 ---------- ? + ?

Volume of Oxygen reacted is 50 cm3 because according to the chemical equation , 2 of C2H2 requires 5 of O2 , so 20 of C2H2 requires 50 of O2 !!

NOW ACCORDING TO EQUATION :

1 cm3 + 2.5 cm3 ---------- 2 cm3 + 1 cm3
20cm3 + 50cm3 --------- 40cm3 + 20 cm3

Total volume of gases remaining : ( 500 - 50) + 40 = 490 cm3 !!!

The main part of the question to understand is that O2 was in excess !!!
 
Saad the Paki

Saad the Paki

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Mr.Physics said:
It's C guyzz !! It's really easy !! Just a bit tricky !!
Equation : 2C2H2 + 5O2 ----- 4CO2 + 2H2O

Volumes used : 20 cm3 + 500cm3 ------ ? + ?

Volumes actually
reacted : 20 cm3 + 50cm3 ---------- ? + ?

Volume of Oxygen reacted is 50 cm3 because according to the chemical equation , 2 of C2H2 requires 5 of O2 , so 20 of C2H2 requires 50 of O2 !!

NOW ACCORDING TO EQUATION :

1 cm3 + 2.5 cm3 ---------- 2 cm3 + 1 cm3
20cm3 + 50cm3 --------- 40cm3 + 20 cm3

Total volume of gases remaining : ( 500 - 50) + 40 = 490 cm3 !!!
The main part of the question to understand is that O2 was in excess !!!
Click to expand...
Allrriigghht...!!! Nice one..!
U saw u're Mr.Physics but u seem equally good at chemistry too..!:)(y);):D
 
lina1999

lina1999

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Can u help please
Chemistry doubt
I need an explanation about the preparation of soluble and insoluble salts including all the titration, neutralization
And in what cases can we use them
 
Saad the Paki

Saad the Paki

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Sooo.. a little bit of help needed..
a)(i) can be either burette or measuring cylinder?
a)(ii) i have no clue..
 

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Muaaz Iqbal

Muaaz Iqbal

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lina1999 said:
Can u help please
Chemistry doubt
I need an explanation about the preparation of soluble and insoluble salts including all the titration, neutralization
And in what cases can we use them
Click to expand...
This is All what you need :D
 

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Muaaz Iqbal

Muaaz Iqbal

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Secondly I'm facing Problem in Chem paper 6 And it's Hard for me to attempt Question Like these in Attachment
Guys you got any tip for that...
 

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Saad the Paki

Saad the Paki

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Muaaz Iqbal said:
Secondly I'm facing Problem in Chem paper 6 And it's Hard for me to attempt Question Like these in Attachment
Guys you got any tip for that...
Click to expand...
Attachment 1.: these type of questions require alot of practice but if u have enough practical experience then it becomes easier for u... U need to think logically here
Attachment 2 : I dont understand what the problem is?
 
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