Write five applications of buffer solutions.

1. Buffers are used in biochemical reactions, such as in PCR reactions, to maintain a consistent pH. 

2. Buffers are used in chromatography to separate molecules. 

3. Buffers are used in dialysis to maintain a constant ionic concentration. 

4. Buffers are used in DNA sequencing to stabilize the pH of the gel. 

5. Buffers are used in cell culture to maintain a constant pH in the growth medium.

Examples of buffer solutions include Tris-HCl, phosphate buffer, and glycine buffer. Blood is also a buffer solution.