What is molarity of pure water?
What is molarity of pure water?
- $18.36\, M$
- $1.16 \,M$
- $55.56 \,M$
- $5.56\, M$
The Correct Option is C
Solution and Explanation
Density of water = 1 g/cm3 and its molecular weight is 18. So, 1000 cm3 of water will weigh 1000 g of water.
Now, we know that molarity \(=\frac{\text { Mass of water }}{\text { Molecular weight }}\) \(=\frac{1000}{18}\) \(=55.56 \,M\)
\(Molarity = \frac{\text { Mass of water }}{\text { Molecular weight }}\)
\(Molarity = \frac{1000}{18}\)
\(Molarity = 55.56 M\)
Hence, the molarity of water is 55.56 M.
Top Questions on Solutions
- A solution of glucose (molar mass = 180 g mol\(^{-1}\)) in water has a boiling point of 100.20°C. Calculate the freezing point of the same solution. Molal constants for water \(K_f\) and \(K_b\) are 1.86 K kg mol\(^{-1}\) and 0.512 K kg mol\(^{-1}\) respectively.
- Define Azeotrope. What type of Azeotrope is formed by negative deviation from Raoult's law? Give an example.
- Give reasons:
(a) Cooking is faster in a pressure cooker than in an open pan.
(b) On mixing liquid X and liquid Y, volume of the resulting solution decreases. What type of deviation from Raoult's law is shown by the resulting solution? What change in temperature would you observe after mixing liquids X and Y? - An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels because __________
- In case of association, abnormal molar mass of solute will:
Questions Asked in AIIMS exam
- Which of the following is a globular protein?
- AIIMS - 2024
- Biomolecules
What is the correct IUPAC name for the following compound?- AIIMS - 2024
- Organic Chemistry - Some Basic Principles and Techniques
What is the major product formed when phenol is treated with sodium dichromate (\( \text{Na}_2\text{Cr}_2\text{O}_7 \)) and sulfuric acid (\( \text{H}_2\text{SO}_4 \))?- AIIMS - 2024
- Organic Chemistry - Some Basic Principles and Techniques
- In a diffraction experiment, the fringe width $ \beta $ is 0.3 mm, the distance from the slit to the screen $ D $ is 5 cm, and the slit width $ d $ is 3 mm. What is the wavelength $ \lambda $?
What is the major product of the reaction?- AIIMS - 2024
- Organic Chemistry - Some Basic Principles and Techniques
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.