Food Chemistry

To determine the correct structure of the complex compound , we must consider the given information about its behavior in water and its reaction with excess solution:

1. When one mole of the complex dissolves in water, it gives three moles of ions.
2. One mole of the complex reacts with an excess of to yield two moles of .

Let's evaluate each structural option against these criteria:

1. Option 1:

This complex will dissociate in water as follows:

When reacting with excess , both chloride ions precipitate as :

Thus, Option 1 meets both criteria: it forms three ions upon dissociation and produces two moles of when treated with .

1. Option 2:

This option doesn't align with the given conditions as it suggests extra coordinated water/ammonia molecules, which complicates the dissociation behavior beyond the specified 3 ions.

1. Option 3:

This structure suggests that there are two coordination chlorides, which would lead to a different reaction behavior with making the formation of two moles of less feasible.

1. Option 4:

This option suggests an incorrect stoichiometry yielding more ions that do not fit the given conditions.

Hence, the correct structure of the complex based on the given information is:

.