The molarity of pure water is:
- 100
- 55.6
- 18
- 5.56
The Correct Option is B
Solution and Explanation
At 25°C, density of water = 1 g/ml
1 g = 1 ml
So, 1000 g = 1000 ml
Now, number of moles of water \(=\frac{1000}{18}=55.55 \,mol\)
Molarity of water \(=\frac{55.6}{1 \,L }=55.55\, M\)
Hence, the molarity of pure water is 55.6 M.
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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.