Question

What Are Group $2$ Cations?

Answer 1

Cations:

• It is defined as positively charged ions that migrate towards the cathode.
• Cation is a word derived from the Greek word kation which means ‘to go down.
• It has more protons than electrons, which gives it a net positive charge.
• The number of electrons lost gives the positive group.

Group $\mathrm{II}$ Cations:

• Group 2 Cations produce insoluble sulfides.
• It can be precipitated by adding an acidic solution of Hydrogen Sulfide${\mathrm{H}}_2\mathrm{S}$.
• Examples of Group 2 Cations:
• Mercuric ion $\left({\mathrm{Hg}}^{2+}\right)$
• Lead (II) ion $\left({\mathrm{Pb}}^{2+}\right)$
• Cupric ion$\left({\mathrm{Cu}}^{2+}\right)$
• Bismuth ion$\left({\mathrm{Bi}}^{3+}\right)$
• Cadmium ion$\left({\mathrm{Cd}}^{2+}\right)$
• Arsenic ion$\left({\mathrm{As}}^{3+}\right)$
• Antimony (III) ion$\left({\mathrm{Sb}}^{3+}\right)$
• Tin or Stannic ion$\left({\mathrm{Sn}}^{4+}\right)$