1. What Is Working Concentration?

Working concentration refers to the final concentration of a substance after dilution from a stock solution. It is commonly used in laboratory settings to prepare solutions of desired concentrations for experiments and analyses.

2. How Does The Calculator Work?

The calculator uses the dilution formula:

Where:

• \( C_{working} \) — Working concentration (mol/L)
• \( C_{stock} \) — Stock concentration (mol/L)
• \( V_{stock} \) — Volume of stock solution used (mL)
• \( V_{total} \) — Total volume after dilution (mL)

Explanation: This formula calculates the final concentration when a specific volume of stock solution is diluted to a total volume.

3. Importance Of Dilution Calculations

Details: Accurate dilution calculations are essential for preparing solutions with precise concentrations, ensuring experimental reproducibility, and maintaining consistency in analytical methods.

4. Using The Calculator

Tips: Enter stock concentration in mol/L, stock volume in mL, and total volume in mL. All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between stock and working concentration?
A: Stock concentration is the concentrated solution, while working concentration is the diluted solution ready for use in experiments.

Q2: Can I use different units for volume?
A: Yes, but ensure all volume units are consistent (all in mL or all in L). The calculator currently uses mL.

Q3: What if my stock concentration is in g/L instead of mol/L?
A: Convert to mol/L using the molecular weight before using this calculator, or modify the formula accordingly.

Q4: How accurate is this calculation?
A: The calculation is mathematically precise. Accuracy depends on the precision of your measurements and the quality of your stock solution.

Q5: Can I calculate stock volume needed for a specific working concentration?
A: Yes, rearrange the formula: \( V_{stock} = \frac{C_{working} \times V_{total}}{C_{stock}} \)