pH paper, also called litmus paper, is filter paper that is treated with natural water soluble dye from lichens. pH paper is used as an indicator to test the acidity of water-based liquids. More »

By definition, pH is a measure of the hydrogen ions in an aqueous solution. As table salt, in its pure form, is not dissolved in water, it has no pH. More »

Acid is defined as a chemical species that donates hydrogen ions or protons and accepts electrons. Scientists classify acids as weak or strong. Mineral acids include such compounds as sulfuric acid and hydrochloric acid.... More »

A piece of pH indicator paper is used to gauge the acidity or alkalinity of a solution. Different types of pH indicator paper are used depending on the type of test and level of accuracy required, such as red or blue lit... More »

Fluted filter paper is a circular piece of filter paper folded in an accordion style and used to filter solid impurities from a liquid during gravity filtration. The fluting of the paper increases the surface area of the... More »

India ink, Congo red and Eosin may be used as alternative dyes in place of Nigrosin for negative staining. India ink works well, but its tiny particles cause Brownian movement, which makes identifying the bacteria a bit ... More »

Regular paper can be folded and cut to make natural-looking six-pointed snowflakes, or filter paper can be soaked in a super-saturated solution of borax to create crystallized snowflakes. In either project, art imitates ... More »

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