In addition to this acids are known for having a sour taste. A caution, when working with substances in the lab, never stick anything in your mouth. Do not taste the substance to see if they are sour or bitter. Also when doing lab experiments with chemical, you should not stick anything near your face. This includes smelling, tasting, and looking.
Bases are substances that are located lower down on the pH scale.
They run from 8 to 14. Eight is the weakest, and fourteen is the strongest acid there is. To see if a substance is a base, a litmus test may be done. If the test result are blue then the substance is a base. Bases feel soapy and slippery, and in addition to this they have a bitter taste.