Analytical Chemistry Question 44
Question: When acetic acid and $ K_4Fe{{( CN )}_6} $ is added to a copper salt, a chocolate precipitate is obtained of the compound
Options:
A) Copper cyanide
B) Copper ferrocyanide
C) Basic copper sulphate
D) Basic copper cyanide
Show Answer
Answer:
Correct Answer: B
Solution:
$ Cu{{(NH_3)}_4}{{(NO_3)}_2}+4CH_3COOH\to Cu{{(NO_3)}_2} $
$ +4CH_3COONH_4 $
$ 2Cu{{(NO_3)}_2}+K_4[Fe{{(CN)}_6}]\to \underset{chocolateppt}{\mathop{Cu_2Fe{{(CN)}_6}}} $
$ +4KNO_3 $
BETA
