Question

Which of the following statements is true about the reaction of ferric chloride with ammonium hydroxide?

i. A reddish brown precipitate is formed.
ii. A dirty green precipitate is formed.
iii. $Fe{\left(OH\right)}_3$ is formed.
iv. $Fe{\left(OH\right)}_2$ is formed.

[1 mark]

• A. (i) and (iv)
• B. (ii) and (iv)
• C. (i) and (iii)
• D. (ii) and (iii)

Answer 1

The correct option is C (i) and (iii)

When ferric chloride reacts with ammonium hydroxide, a reddish brown precipitate of ferric hydroxide $\left(Fe{\left(OH\right)}_3\right)$ is formed. The following reaction takes place:

$FeC{l}_3\left(s\right)+N{H}_{4}OH\left(aq\right)\to N{H}_{4}Cl\left(aq\right)+Fe{\left(OH\right)}_3\left(s\right)(Reddishbrownppt.)$