Question:
Aluminium reacts with $NaOH$ and forms compound �$X$�. If the coordination number of aluminium in �$X$ � is $6$, the correct formula of $X$ is
Aluminium reacts with $NaOH$ and forms compound �$X$�. If the coordination number of aluminium in �$X$ � is $6$, the correct formula of $X$ is
Updated On: Jan 30, 2025
- $\left[ Al \left( H _{2} O \right)_{4}( OH )_{2}\right]^{+}$
- $\left[ Al \left( H _{2} O \right)_{3}( OH )_{3}\right]$
- $\left[ Al \left( H _{2} O \right)_{2}( OH )_{4}\right]^{-}$
- $\left[ Al \left( H _{2} O \right)_{6}\right]( OH )_{3}$
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The Correct Option is C
Solution and Explanation
$2 Al +2 NaOH +2 H _{2} O \longrightarrow \underset{\text { sodium meta aluminate }}{2 NaAlO} +3 H _{2}$
Sodiummetaaluminate, thus formed, is soluble in water and changes into the complex $\left[ Al \left( H _{2} O \right)_{2}( OH )_{4}\right]^{-}$, in which coordination
number of $Al$ is $6 .$
Sodiummetaaluminate, thus formed, is soluble in water and changes into the complex $\left[ Al \left( H _{2} O \right)_{2}( OH )_{4}\right]^{-}$, in which coordination
number of $Al$ is $6 .$
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Concepts Used:
Solutions
A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm.
For example, salt and sugar is a good illustration of a solution. A solution can be categorized into several components.
Types of Solutions:
The solutions can be classified into three types:
- Solid Solutions - In these solutions, the solvent is in a Solid-state.
- Liquid Solutions- In these solutions, the solvent is in a Liquid state.
- Gaseous Solutions - In these solutions, the solvent is in a Gaseous state.
On the basis of the amount of solute dissolved in a solvent, solutions are divided into the following types:
- Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
- Saturated Solution- A solution in which no solute can be dissolved after reaching a certain amount of temperature is known as an unsaturated saturated solution.
- Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.