$A$ complex salt can be formed by the combination of $[Co^{III}(NH_3)_5Cl]^X$ with which of the following?

The secondary valences (coordination numbers) of the following complexes based on their reactions with excess $AgNO_3$ are:

Formula of the complexes	Moles of $AgCl$ precipitated per mole of complex
$(I) \ CoCl_3 \cdot 6 H_2O$	$3$
$(II) \ NiCl_3 \cdot 6 H_2O$	$2$
$(III) \ Co(SO_4)Br \cdot 5 NH_3$	$1$

Find the secondary valences for $(I), (II),$ and $(III)$ respectively.

Excess of silver nitrate solution is added to $100 \ mL$ of $0.01 \ M$ pentaaqua chloro chromium $(III)$ chloride solution. The mass of silver chloride obtained in grams is [Atomic mass of silver is $108$].

Explain double salts and coordination compounds.

An aqueous solution of the complex $[Cu(NH_3)_4]SO_4$ gives the test for:

Ammonia acts as a ligand but ammonium ion does not form complexes because