Dilution Formula
Question 1: What do you mean by dilution? Give one example.
Answer:
Dilution is the process of decreasing the concentration of a solution by adding more solvent to it. Dilution may also be defined as the decrease in the pH of a chemical which may be solution, vapour or a gas. Concentration is the reverse of dilution.
For example, adding more water to sugar syrup leads to decrease in concentration of the solution and the solution is said to be diluted.
Question 2: State dilution formula?
Answer:
Dilution formula can be expressed as follows:
M1V1 = M2V2
where,
M1 is Initial molarity of the solution
M2 is Molarity of solution after dilution
V1 is Initial Volume of the solution
V2 is Volume after dilution
Question 3: Why does a solution become less conducting when diluted?
Answer:
When a solution is diluted, the amount of solvent increases and the amount of solvent remains same. Thus the number of solute particles per unit volume of the solution decreases. The conductivity of solution is a property of solute particles, the conductivity decreases on dilution.
Question 4: Why molality is not considered a unit for concentration in the dilution formula?
Answer:
Molality is defined as the number of moles of solute per kg of solvent. In chemistry we generally deal with liquid quantity in litres and to calculate the weight of solvent in kg, we will require density of the liquid. Thus we will need to calculate the weight for each type of solvent as different solvents have different density.
Question 5: What is serial dilution?
Answer:
Serial dilution is the dilution of a solution in stepwise manner. The dilution factor in each step is a constant.
Related Resources
Dilution Formula
The concentration of a solution depends upon the amount of solute present in the solution. The higher the amount of solute, the more concentrated is the solution. Dilution refers to a decrease in the concentration of a solution. It is generally done by increasing the content of the solvent in the solution. For example, adding more water to sugar syrup leads to a decrease in the concentration of the solution and the solution is said to be diluted.
Thus we can define dilution as:
Dilution is the process of decreasing the concentration of a solution by adding more solvent to it. Dilution may also be defined as the decrease in the pH of a chemical which may be solution, vapour or a gas. Concentration is the reverse of dilution.
Note that the amount of solute does not change in the dilution and concentration process. Only the amount of solvent changes.