How do you prepare 0.05M Phosphate buffer of pH 6.8?

To prepare a 0.05M phosphate buffer of pH 6.8, you would need to mix a specific ratio of monosodium phosphate and disodium phosphate in a certain volume of water. The exact amounts can be calculated using the Henderson-Hasselbalch equation or by using online calculators. Adjust the pH using small amounts of acid or base as needed.