You can select from a range of bases.
Ammonia solution is an approproate example to start with.
You can select from a range of acids. Ethanoic acid solution is an approproate example to start with. If you were using a Java-enabled browser ,you would see pH curve plotter program here instead of this paragraph. Check your browser options list to enable Java programs to run in this browser. The relative contribution to the overall curve shape of the acid or the base depends on the strengths of the acid or the base.