Question

The name of [Cr(NH₃)₄Cl₂]NO₃ is ______.

Options

• tetraamminodichloridochromium(III) nitrate

• tetraaminodichloridochromium(II) nitrate

• dichloridotetraamminechromium(II) nitrate

• tetraamminedichloridochromium(III) nitrate

Answer 1

The name of [Cr(NH₃)₄Cl₂]NO₃ is tetraamminedichloridochromium(III) nitrate.

Explanation:

The complex [Cr(NH₃)₄Cl₂]NO₃ is named Tetraammine dichlorido chromium(III) nitrate because:

• NH₃ (ammine) ligands are 4, so “tetraammine.”
• Cl⁻ (chlorido) ligands are 2, so “dichlorido.”
• The metal Cr has an oxidation state of +3, so “chromium(III).”
• NO₃ is the counterion, so it’s named nitrate.