Chemistry: Post your doubts here!

[Layla Omar]

hey has anyone done the oct/nov 2010 variant paper 53 . q2. if you have please send me a copy of how you did it

 

[Zain Javaid]

anybdy plz help hhw to solve this log

 

[sachu06]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s13_qp_52.pdf
question numebr 1 (c) (iv)
how do you solve it
help fast!!

 

[Sean002]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s13_qp_52.pdf
question numebr 1 (c) (iv)
how do you solve it
help fast!!

Solubility of Ca(OH)2 is 1g/dm3
Mr of Ca(OH)2 is 74.1
Assume volume = 1dm3
only 1g of Ca(OH)2 able to dissolve in 1dm3 of water
mol of 1g Ca(OH)2= mass/ molar mass = 1/74.1
conc = mol / volume = (1/74.1)/1 = 0.0135 mol/dm3

 

[AbbbbY]

Just got done with this. It might help any of you like myself who left P5 to the last day. (Well, me, because I really don't care about it. It's such a tiny percentage etc).
What I noticed going through a few papers was some Q2's actually showed you how to do Q1's of other years, so I made a list of the topics asked for in each Q1 and method boldly explained in relevant Q2's.

 

[hela]

Just got done with this. It might help any of you like myself who left P5 to the last day. (Well, me, because I really don't care about it. It's such a tiny percentage etc).
What I noticed going through a few papers was some Q2's actually showed you how to do Q1's of other years, so I made a list of the topics asked for in each Q1 and method boldly explained in relevant Q2's.

Excellent summary

 

[hela]

Any idea about paper 5 chemistry

 

[kingo44]

When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is
produced.

What is the nitrate compound?
A beryllium nitrate
B calcium nitrate
C magnesium nitrate
D strontium nitrate

 

[kingo44]

When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is
produced.

What is the nitrate compound?
A beryllium nitrate
B calcium nitrate
C magnesium nitrate
D strontium nitrate

 

[kingo44]

When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is
produced.

What is the nitrate compound?
A beryllium nitrate
B calcium nitrate
C magnesium nitrate
D strontium nitrate

 

[kingo44]

When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is
produced.

What is the nitrate compound?
A beryllium nitrate
B calcium nitrate
C magnesium nitrate
D strontium nitrate

 

[kingo44]

When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is
produced.

What is the nitrate compound?
A beryllium nitrate
B calcium nitrate
C magnesium nitrate
D strontium nitrate

 

[Snowysangel]

When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is
produced.

What is the nitrate compound?
A beryllium nitrate
B calcium nitrate
C magnesium nitrate
D strontium nitrate

Calcium nitrate?

 

[NinjaInPyjamas]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_w04_qp_1.pdf

please help! can someone explain how q9 is B? and q3 also please!

 

[Jelleh Belleh]

Hey guys, I was wondering if anyone could upload any answered & corrected practical paper? I have no idea what format we're supposed to give our answers in, my teacher isn't particularly helpful. What I'm mainly after is the "appropriate form" of recording tests & their observations. Any help at all would be greatly appreciated.

 

[kingo44]

metal nitrate

 

[kingo44]

D strontium nitrate

 

[mr0fisher]

who did p51 today

 

[Sameer556]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w11_qp_13.pdf
Question 10. Why is the answer A?

 

[Manobilly]

who did p51 today

me