Materials:

- Concentrated sulfuric acid (H2SO4), approximately 18 M

- Deionized or distilled water

- Graduated cylinder

- Beaker

- Stirring rod or magnetic stirrer

- Safety goggles and gloves

Procedure:

1. Put on your safety goggles and gloves to protect yourself from the concentrated acid.

2. Slowly add the concentrated sulfuric acid to the graduated cylinder. Be careful not to splash or spill the acid.

3. Record the volume of concentrated acid you added.

4. Slowly add deionized or distilled water to the beaker. Stir the solution constantly to ensure that the acid and water mix thoroughly.

5. Continue adding water until the total volume of the solution is 7 times the volume of concentrated acid you added in step 2.

6. Stir the solution again to ensure that it is well-mixed.

7. Your 7 M sulfuric acid solution is now ready to use.

Note: Concentrated sulfuric acid is a corrosive and dangerous substance. Always handle it with care and follow proper safety precautions.