Question

The number of moles of AgCl precipitated when excess AgNO$_3$ solution is mixed with one mole of [Co(NH$_3$)$_6$]Cl$_3$ is:

• A. 0
• B. 1
• C. 2
• D. 3

Hint:

When complex salts like [Co(NH$_3$)$_6$]Cl$_3$ dissociate, count the number of chloride ions to predict the amount of AgCl precipitated.

Answer 1

The Correct Option is B

In this reaction, 1 mole of [Co(NH$_3$)$_6$]Cl$_3$ yields 3 moles of Cl$^-$ ions. Excess AgNO$_3$ reacts with only one of these moles to precipitate AgCl, resulting in the formation of 1 mole of AgCl.