The 11 household chemicals pictured above will be individually added to cabbage juice and the color of the juice documented. These chemicals are considered standards, because the pH that it will produce in water has already been found and recorded in the chemistry literature. The known pH is written under each pictured container. The pH range is from 0 to 14, and these standards cover that complete range. Eleven transparent containers will be filled with cabbage juice and one by one the chemicals will be added to a single container. The color range will be recorded. Now, any chemical with an unknown pH can be added to produce a color and that color compared to the standards to determine the pH produced by the test sample.