litmus test. Paper impregnated with litmus, usually cut in narrow strips. Dipping red litmus paper into a basic solution turns it blue; dipping blue litmus paper into an acidic solution turns it red.
Paper with powder extracted from certain plants that tests the pH of a substance. Acid turns red while base turns blue; neutral remains white. The stronger the acid or base, the more intense red or blue the color of the litmus paper turns.
paper that indicates how acidic or basic an object or liquid is. If the paper turns red when touched by the object or liquid, it is acidic. If the paper turns blue, the object or liquid is basic.
A pH indicator paper. It turns red in acidic and blue in alkaline solutions.
It is a paper with extraction of powder from certain plants to test the pH of a substance. In it acid turns red and base turns blue; neutral remains white. The intensity of the change color depends upon the concentration of the acid or base.
unsized paper treated with litmus for use as an acid-base indicator
chemically sensitive paper used for testing pH.
A small strip of treated paper used in wine making for checking the acid level of a juice. Also called pH Strips.
reads pH levels when dipped in water or nutrient solution.