PH Meters and How They Work
PH Meters and How They Work Acids and bases have free hydrogen and hydroxide ions in a liquid medium. A solution with more hydroxide ions than hydrogen ions is stated to be standard, and one with more hydrogen ions is said to be acidic. A pH meter utilizes an electric probe to find the pH of a service. The pH meter contains 2 electrodes, called the sensing unit electrode and the reference electrode. They both include wires made of silver and coated with silver chloride. They contain glass tubes with options of pH 7 buffer and saturated potassium chloride respectively. There is a small bulb at the end of the sensor electrode which is made from a permeable glass membrane with silica and metal salts. This membrane is made very thin so regarding lower the resistance brought on by it. It is this bulb which is dipped in the wanted option in order to determine pH. When the probe is dipped in a service, hydrogen ions replace some of the metal ions from the bulb. Hydrogen ions, being much small...