chemistry aqa a-level help complex ions

Watch
onedance1
Badges: 11
Rep:
?
#1
Report Thread starter 4 weeks ago
#1
Q2.The pigment ’Cobalt Yellow’ contains an octahedral complex of cobalt(III) and nitrate(III) ions (NO2-)
Analysis shows that Cobalt Yellow contains 13.0% of cobalt, 18.6% of nitrogen and 25.9% of potassium by mass. The remainder is oxygen.
2
Use these data to calculate the empirical formula of Cobalt Yellow. Show your working.
................................ ................................ ................................ ........................

Deduce the structural formula of the cobalt-containing ion in Cobalt Yellow.

i dont understand how im supposed to work out the second part (deducing the structural formula)
i got the empirical formula part correct
Last edited by onedance1; 4 weeks ago
0
reply
charco
Badges: 17
Rep:
?
#2
Report 4 weeks ago
#2
(Original post by onedance1)
Q2.The pigment ’Cobalt Yellow’ contains an octahedral complex of cobalt(III) and nitrate(III) ions (NO2-)
Analysis shows that Cobalt Yellow contains 13.0% of cobalt, 18.6% of nitrogen and 25.9% of potassium by mass. The remainder is oxygen.
2
Use these data to calculate the empirical formula of Cobalt Yellow. Show your working.
................................ ................................ ................................ ........................

Deduce the structural formula of the cobalt-containing ion in Cobalt Yellow.

i dont understand how im supposed to work out the second part (deducing the structural formula)
i got the empirical formula part correct
I imagine that you are supposed to write the formula of the complex, with potassium as the balancing ion(s) and the octahedral complex as the negative ion.
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 do you want most from university virtual open days and online events?

I want to be able to watch in my own time rather than turn up live (189)
29.35%
I want to hear more about the specifics of the course (106)
16.46%
I want to be able to dip in and dip out of lots of different sessions (58)
9.01%
I want to meet current students (54)
8.39%
I want to meet academics and the people that will be teaching me (51)
7.92%
I want to have a taster lecture or workshop to see what the teaching is like (128)
19.88%
My parents/guardians are more interested than me to be honest (38)
5.9%
Other things – I'll tell you in the thread (20)
3.11%

Watched Threads

View All