Preparation of 0.1N H2SO4 for 100mL
Preparing a 0.1N (normal) solution of sulfuric acid (H2SO4) for 100mL involves calculating the required amount of concentrated H2SO4 and diluting it with distilled water. Here's a step-by-step guide to prepare 0.1N H2SO4 for 100mL:
Calculations
To prepare 0.1N H2SO4, we need to calculate the amount of concentrated H2SO4 required. The normality of a solution is defined as the number of equivalents per liter. Since we want to prepare 100mL (0.1L) of 0.1N H2SO4, we need:
- 0.1 equivalents/L × 0.1L = 0.01 equivalents
The equivalent weight of H2SO4 is 49.04 g/equivalent. Therefore, we need:
- 0.01 equivalents × 49.04 g/equivalent = 0.4904 g H2SO4
Preparation
Step 1: Weighing
Weigh 0.4904 g of concentrated H2SO4 using a balance.
Step 2: Transferring
Transfer the weighed H2SO4 to a 100mL volumetric flask.
Step 3: Dilution
Add distilled water to the flask slowly while stirring until the volume reaches 100mL. Make sure to mix the solution thoroughly to ensure uniformity.
Step 4: Mixing
Mix the solution well to ensure complete dissolution of H2SO4.
Precautions
- Always handle concentrated H2SO4 with caution, as it can cause skin irritation and burns. Wear protective gloves, goggles, and lab coats when handling the acid.
- Use a fume hood to minimize exposure to H2SO4 vapors.
- Dispose of the waste solution according to local regulations and guidelines.
By following these steps, you should now have 100mL of 0.1N H2SO4 solution prepared for use in your experiments or analyses.
