Question

The colour of $FeS{O_4}.{(N{H_4})_2}S{O_4}.6{H_2}O$ is:
A.blue
B.green
C.white
D.red

Answer 1

We know that $FeS{O_4}.{(N{H_4})_2}S{O_4}.6{H_2}O$ is an inorganic compound. It is ammonium iron$(II)$sulphate. The molecular mass of $FeS{O_4}.{(N{H_4})_2}S{O_4}.6{H_2}O$ is $392.13g/mol$. It is soluble in water . It is slightly acidic in nature because of it’s ammonium ions.

Complete step by step answer:
First of all it becomes important for us to know the fact that $FeS{O_4}.{(N{H_4})_2}S{O_4}.6{H_2}O$ is known as the Mohr’s salt. It has two different cations $F{e^{ + 2}}$ and $N{H_4}^ +$.Due to this reason Mohr’s salt is classified as double salt . It is a double salt of ferrous sulphate and ammonium sulphate. Mohr’s salt is slightly toxic in nature. It can cause health issues if breathed in and cause irritating if touched. The colour of Mohr’s salt is light green. It is slightly acidic in nature and turns blue litmus paper into red colour. It is a very important inorganic compound used in analytical chemistry. It is used in titration reactions. So from the above discussion and explanation it is clear to us that the correct answer of the given question is option: B. green

Additional information:
Double salts are formed from a three component system. It consists of two different salts and water. Some of the examples of double salts are Mohr’s salt, Alum and Tutton’s salt. Mohr’s salt is toxic and higher exposure to it can cause vomiting, nausea, stomach pain, drowsiness and diarrhoea.

Note:
Always remember that $FeS{O_4}.{(N{H_4})_2}S{O_4}.6{H_2}O$ is known as Mohr’s salt. It is green in colour. It is slightly acidic in nature due to the presence of $N{H_4}^ +$ions. It is slightly soluble in water. It is also toxic in nature.