Appeared in: 2023 (3 sets)
When a coordination compound $\text{NiCl}_2 \cdot 6\text{H}_2\text{O}$ is mixed with $\text{AgNO}_3$ solution, 2 moles of $\text{AgCl}$ are precipitated per mole of the compound. Write the structural formula of the complex and secondary valency for Nickel ion.