• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Mathematics: Post your doubts here!

Messages
12
Reaction score
22
Points
3
CHM PAPER 6 doubt
Copper(II) oxide and carbon are both black solids. Copper(II) oxide reacts with dilute sulfuric
acid to form aqueous copper(II) sulfate. Carbon does not react with dilute sulfuric acid.
You are given a mixture of copper(II) oxide and carbon and access to dilute sulfuric acid.
Plan an experiment to investigate the percentage of copper(II) oxide in the mixture.
 
Messages
409
Reaction score
628
Points
103
y didi u say that
u broke my heart yaaaarrr
that is one thing i did not wanna hear
BUT myfrnd gave it in oct nov she got an A which is good in language
though she was not sooo good in urdu!
SO IM HOPING I PROVE U WRONG how was ur ppr
Sorry buddy :)
 
Messages
409
Reaction score
628
Points
103
The graph today was something like this...?

graph.png
 
Messages
150
Reaction score
235
Points
53
CHM PAPER 6 doubt
Copper(II) oxide and carbon are both black solids. Copper(II) oxide reacts with dilute sulfuric
acid to form aqueous copper(II) sulfate. Carbon does not react with dilute sulfuric acid.
You are given a mixture of copper(II) oxide and carbon and access to dilute sulfuric acid.
Plan an experiment to investigate the percentage of copper(II) oxide in the mixture.
In which exam was that ??
 
Messages
26
Reaction score
46
Points
3
CHM PAPER 6 doubt
Copper(II) oxide and carbon are both black solids. Copper(II) oxide reacts with dilute sulfuric
acid to form aqueous copper(II) sulfate. Carbon does not react with dilute sulfuric acid.
You are given a mixture of copper(II) oxide and carbon and access to dilute sulfuric acid.
Plan an experiment to investigate the percentage of copper(II) oxide in the mixture.
yeah man this question is messed up..
 
Messages
1
Reaction score
1
Points
1
So i made this really stupid mistake for the last question of p-42, basically the answer was supposed to come in fraction form but intstead of writing 1/3, i wrote 3 and same goes for all the shapes. So i was wondering if i'll get any marks for that question or not :( somebody help pleaseee
 
Messages
603
Reaction score
1,102
Points
153
CHM PAPER 6 doubt
Copper(II) oxide and carbon are both black solids. Copper(II) oxide reacts with dilute sulfuric
acid to form aqueous copper(II) sulfate. Carbon does not react with dilute sulfuric acid.
You are given a mixture of copper(II) oxide and carbon and access to dilute sulfuric acid.
Plan an experiment to investigate the percentage of copper(II) oxide in the mixture.

Procedure (explanation in brackets)
1. Weigh the mixture
2. Add excess sulfuric acid to the mixture (to dissolve the Copper (II) oxide)
3. Filter the mixture (separate solid carbon and copper solution)
4. Rinse the carbon residue with water and dry
5. Weigh the dry carbon
6. % mass of carbon = weight of carbon/weight of mixture x 100%
7. % mass of copper (II) oxide = 100% - answer in part 6
 
Top