1). Both H2PO3− and HS− are amphoteric. Write an equation toshow how H2PO3− can act as a base with HS− acting as an acid.Express your answer as a chemical equation. Identify all of thephases in your answer.
2). Determine the pH of each of the following solutions.
a). 8.59×10−2M HClO4 b). a solution that is 4.7×10−2M in HClO4 and5.1×10−2 M in HClc). a solution that is 1.10%HCl by mass (Assume a density of 1.01 g/mL for thesolution.)
3). Determine thepH of an HF solution of each of the followingconcentrations.
a). 0.270 M b). 5.10×10−2 M c). 2.30×10−2M d). In which cases can you not make the simplifying assumptionthat x is small?
4). What volume of 0.879 M KOHsolution is required to make 3.63 L of a solution with pH of12.8? Express your answerwith the appropriate units.
