1. What is the Concentration Formula?

The concentration formula \( C = \frac{n}{V} \) is a fundamental equation in A-Level Chemistry that calculates the concentration of a solution in moles per cubic decimeter (mol dm⁻³). It relates the amount of solute to the volume of solution.

2. How Does the Calculator Work?

The calculator uses the concentration formula:

Where:

• \( C \) — Concentration (mol dm⁻³)
• \( n \) — Amount of substance (moles)
• \( V \) — Volume (dm³)

Explanation: This formula calculates the molar concentration by dividing the number of moles of solute by the volume of the solution in cubic decimeters.

3. Importance of Concentration Calculation

Details: Accurate concentration calculations are essential for preparing solutions, conducting titrations, calculating reaction rates, and understanding chemical equilibria in A-Level Chemistry.

4. Using the Calculator

Tips: Enter the amount of substance in moles and volume in cubic decimeters. Both values must be positive numbers. The calculator will compute the concentration in mol dm⁻³.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between concentration and amount?
A: Amount (n) refers to the quantity of substance in moles, while concentration (C) refers to the amount per unit volume (mol dm⁻³).

Q2: How do I convert between different volume units?
A: 1 dm³ = 1000 cm³ = 1 liter. Ensure all volume measurements are converted to dm³ before calculation.

Q3: What is the significance of mol dm⁻³ units?
A: Mol dm⁻³ (moles per cubic decimeter) is the standard SI unit for concentration in chemistry, equivalent to molarity (M).

Q4: Can this formula be used for gases?
A: For gases, concentration calculations require consideration of temperature and pressure using the ideal gas law.

Q5: How accurate should my measurements be?
A: For A-Level practical work, measurements should be made to the precision of your equipment (typically ±0.05 cm³ for volume, ±0.0001 g for mass).