Skip to content
ChemistryNEET 2024Titrimetric analysis and salt analysis

Principles Related to Practical Chemistry

During the preparation of Mohr's salt solution (ferrous ammonium sulphate), which of the following acids is added to prevent hydrolysis of the Fe2+\mathrm{Fe^{2+}} ion?

  1. A.concentrated sulphuric acid
  2. B.dilute nitric acid
  3. C.dilute sulphuric acid✓
  4. D.dilute hydrochloric acid

Solution

Dilute sulphuric acid suppresses hydrolysis of Fe2+\mathrm{Fe^{2+}} (which would otherwise give a turbid basic salt) without oxidising it; nitric acid would oxidise Fe2+\mathrm{Fe^{2+}} to Fe3+\mathrm{Fe^{3+}}, and HCl introduces chloride.

Save for spaced revision (free account)

More from this chapter in past papers

From Chemistry › Principles Related to Practical Chemistry › Titrimetric analysis and salt analysis — lectures, notes and every past question on it.

Last revised . Found a mistake? Tell us — corrections are the fastest thing we act on.

ShareWhatsAppTelegram