ardz
Badges: 5
Rep:
?
#1
Report Thread starter 1 year ago
#1
The question says: A student plans a method to prepare pure crystals of copper sulfate the students method is:
1. Add one spatula of calcium carbonate to dilute the hydrochloric acid in a beaker.
2. When the fizzing stops, heat the solution with a Bunsen burner until all the liquid is gone.
The method contains several errors and does not produce copper sulfate crystals.
Explain the improvements the student should make to the method so that pure crystals of copper sulfate are produced.
4
reply
8013
Badges: 19
Rep:
?
#2
Report 1 year ago
#2
The student should let the solution cool down slowly after heating for crystals to be seperated.
The student should use copper (II) hydroxide and sulfuric acid.
0
reply
mgi
Badges: 20
Rep:
?
#3
Report 1 year ago
#3
(Original post by ardz)
The question says: A student plans a method to prepare pure crystals of copper sulfate the students method is:
1. Add one spatula of calcium carbonate to dilute the hydrochloric acid in a beaker.
2. When the fizzing stops, heat the solution with a Bunsen burner until all the liquid is gone.
The method contains several errors and does not produce copper sulfate crystals.
Explain the improvements the student should make to the method so that pure crystals of copper sulfate are produced.
The student actually made calcium oxide and carbon dioxide!!??? .He shoild have been sent home! lol.Start with copper oxide to excess and sulphuric acid in a flask in a warm water bath. Stir it. Filter it. Throw the filter paper away. Warm up the solution and let half of it evaporate. Then pour the remaining solution into a evaporating dish. Leave it to to dry out! You now have copper sulphate crystals. Easy!
1
reply
kai knight
Badges: 1
Rep:
?
#4
Report 1 year ago
#4
(Original post by ardz)
The question says: A student plans a method to prepare pure crystals of copper sulfate the students method is:
1. Add one spatula of calcium carbonate to dilute the hydrochloric acid in a beaker.
2. When the fizzing stops, heat the solution with a Bunsen burner until all the liquid is gone.
The method contains several errors and does not produce copper sulfate crystals.
Explain the improvements the student should make to the method so that pure crystals of copper sulfate are produced.
wasreallyhelpfull
0
reply
mgi
Badges: 20
Rep:
?
#5
Report 1 year ago
#5
(Original post by kai knight)
wasreallyhelpfull
good. no problem!
0
reply
sleezyshrimp
Badges: 1
Rep:
?
#6
Report 8 months ago
#6
So would you pour copper oxide into the sulphuric acid (in the flask) and leave it in a warm water bath. Then stir, filter it afterwards?
0
reply
Pigster
Badges: 20
Rep:
?
#7
Report 8 months ago
#7
(Original post by sleezyshrimp)
So would you pour copper oxide into the sulphuric acid (in the flask) and leave it in a warm water bath. Then stir, filter it afterwards?
You need an excess of the CuO.
You need to evaporate off the water from the filtrate.
If you need dry crystals, you will need to put them in a warm oven.
0
reply
mgi
Badges: 20
Rep:
?
#8
Report 8 months ago
#8
(Original post by sleezyshrimp)
So would you pour copper oxide into the sulphuric acid (in the flask) and leave it in a warm water bath. Then stir, filter it afterwards?
Copper oxide first, then add the sulphuric acid. Stir. Leave it for 10 mins. then filter it!
0
reply
Pigster
Badges: 20
Rep:
?
#9
Report 8 months ago
#9
(Original post by mgi)
Copper oxide first, then add the sulphuric acid. Stir. Leave it for 10 mins. then filter it!
It doesn't matter which you add to which.
0
reply
mgi
Badges: 20
Rep:
?
#10
Report 8 months ago
#10
(Original post by Pigster)
It doesn't matter which you add to which.
no. its just a preference.
0
reply
Pigster
Badges: 20
Rep:
?
#11
Report 8 months ago
#11
(Original post by mgi)
no. its just a preference.
My preference is to start with the acid and add the solid. If it all reacts, add some more, etc. until some solid remains. That way, I don't have to be bothered to do the calculation or get out a balance to ensure the base is in excess.
0
reply
mgi
Badges: 20
Rep:
?
#12
Report 8 months ago
#12
(Original post by Pigster)
My preference is to start with the acid and add the solid. If it all reacts, add some more, etc. until some solid remains. That way, I don't have to be bothered to do the calculation or get out a balance to ensure the base is in excess.
No its not my preference. Do the excess calculation in the planning , weigh out the required amount of solid and measure out the volume of acid. Simple. No guesswork or seeing if it reacts! it will react, we already know that!
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

What factors affect your mental health the most right now?

Anxiousness about lockdown easing (166)
4.89%
Uncertainty around my education (498)
14.68%
Uncertainty around my future career prospects (379)
11.17%
Lack of purpose or motivation (473)
13.94%
Lack of support system (eg. teachers, counsellors, delays in care) (164)
4.83%
Impact of lockdown on physical health (208)
6.13%
Loneliness (288)
8.49%
Financial worries (122)
3.6%
Concern about myself or my loves ones getting/having been ill (137)
4.04%
Exposure to negative news/social media (155)
4.57%
Lack of real life entertainment (186)
5.48%
Lack of confidence in making big life decisions (302)
8.9%
Worry about missed opportunities during the pandemic (315)
9.28%

Watched Threads

View All