Which combination will make a buffer? kh2po4 and k2hpo4 kbr and hbr hno3 and nano3 lioh and licl

The correct option is KH₂PO₄ and K₂HPO₄

Explanation:

A buffer is an aqueous solution that resists change in pH when small quantity of a strong acid/strong base is added. A buffer is made up of an acid and it's conjugate base. Examples of buffer includes, carbonate buffer, phosphate buffer and ammonium buffer.

From the options provided, KH₂PO₄ and K₂HPO₄ will combine to form a phosphate buffer.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.