To make a buffer you will need to mix a solution of a weak base with a weak acid. We will be making a phosphate buffer by combining a phosphate base K2HPO4 (dibasic monohydrogen phosphate) with a phosphate acid KH2PO4 (monobasic dihydrogen phosphate). Equal amounts of each should provide a solution with a pH of 6.8.
Determine the mass of 1 mole of each of the phosphate salts
1 mole of K2HPO4
1 mole of KH2PO4
To make a 0.1 M solution of K2HPO4 how much salt should you add in a 100 ml solution?
To make a 0.1 M solution of KH2PO4 how much salt should you add in a 100 ml solution?
