Color changes Transition metals-Unit 6 chemistry

Watch this thread
JacobBob
Badges: 10
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 3 years ago
#1
Here is a picture of the question Name:  F818EDB7-D211-43B9-B5A2-C9D73D648838.jpeg
Views: 188
Size:  69.9 KB
In part c
They add drops of KMnO4 to a solution which contains Fe2+ ions and they ask about the color change

When I read the question
I thought, the color change they want is the color change of the solution but turns out
They want the color change of the KMnO4 ( from the MS)
How can I tell ?
Attached files
Last edited by JacobBob; 3 years ago
0
reply
memeking
Badges: 6
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 3 years ago
#2
You haven't attached a question.
0
reply
JacobBob
Badges: 10
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report Thread starter 3 years ago
#3
(Original post by memeking)
You haven't attached a question.
Just did, sorry for the delay
0
reply
memeking
Badges: 6
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#4
Report 3 years ago
#4
Because you are adding the MnO4 to the solution in the flask, which is Fe2+. At the end it will be pink (Mn2+)
However, it you were to add the Fe2+ to the MnO4, the MnO4 would be purple, and at the end will be pink again (Mn2+).
0
reply
JacobBob
Badges: 10
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#5
Report Thread starter 3 years ago
#5
But the answer in the mark scheme is purple to colorless .
shouldn’t the brown color of Fe3+ overpower any other color anyway ?
(Original post by memeking)
Because you are adding the MnO4 to the solution in the flask, which is Fe2+. At the end it will be pink (Mn2+)
However, it you were to add the Fe2+ to the MnO4, the MnO4 would be purple, and at the end will be pink again (Mn2+).
0
reply
X

Quick Reply

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

How are you feeling about your results?

They're better than I expected (70)
41.18%
They're exactly what I expected (40)
23.53%
They're lower than I expected (60)
35.29%

Watched Threads

View All