Question

The number of ions formed when [Cu(NH₃)₄]SO₄ is dissolved in water is ______.

Options

• 1

• 2

• 4

• zero

Answer 1

The number of ions formed when [Cu(NH₃)₄]SO₄ is dissolved in water is 2.

Explanation:

[Cu(NH₃)]₄SO₄ consists of the complex ion [Cu(NH₃)₄]²⁺ and the sulfate ion \[\ce{SO}^{2-}_4\]. When it dissolves in water, it dissociates into the following two ions:

1. [Cu(NH₃)₄]²⁺ (the complex ion)
2. \[\ce{SO}^{2-}_4\] (the sulfate ion)

Thus, it forms 2 ions in solution.