How do I prepare 10% ortho-phosphoric acid in 250ml volumetric flask from 85% ortho-phosphoric acid(density 1.69g/ml) ?

Answer 1

To prepare 10% ortho-phosphoric acid in a 250ml volumetric flask from 85% ortho-phosphoric acid, you will need to add the following amounts of each component:

- 85% ortho-phosphoric acid: 212.5ml
- Distilled water: 37.5ml

This will give you a total volume of 250ml and a concentration of 10% ortho-phosphoric acid.