Ph what does it stand for what is p and what is h

Facebook Facebook Twitter Twitter. It is calculated as the negative logarithm of hydrogen ion concentration. Featured Video. Cite this Article Format. Helmenstine, Anne Marie, Ph. What Does pH Stand For? How to Calculate the pH of a Weak Acid.

Chemistry Terminology: Definition of pOH. Here's How to Calculate pH Values. How to Make a Phosphate Buffer Solution. Polyprotic Acid Example Chemistry Problem. For example, the concentrated acids common in laboratories and industry have negative pH values. Even in the environment, pH values as low as Aqueous environmental geochemistry. Upper Saddle River, N. J: Prentice Hall. Terms of Service. Privacy Policy. Partnership Opportunities.

Technical Support. Warranty Registration. Contact Us About Us Support. The pH scale commonly in use ranges from 0 to Published by Houghton Mifflin Company. A numerical measure of the acidity or alkalinity of a solution, usually measured on a scale of 0 to Neutral solutions such as pure water have a pH of 7, acidic solutions have a pH lower than 7, and alkaline solutions have a pH higher than 7. The pH of lemon juice is 2. The normal pH for human blood is 7. All rights reserved.

Cookies enable us to provide the best experience possible and help us understand how visitors use our website. By browsing Materials Today, you agree to our use of cookies. Anyone who has studied any chemistry even at junior high school level will have come across the odd little abbreviation, pH, with its lower case p and its upper case H. The pH scale is a numeric scale, a logarithmic scale in fact, used to specify the acidity or basicity alkalinity of an aqueous solution.

A solution that has a pH of 0 is very acidic with a high concentration of hydrogen ions although things can be of greater acidity , a pH of 7 is a neutral solution, equal concentrations of hydrogen ions and their basic counterpart hydroxy ions.

While pH 14 represents a high concentration of hydroxy ions, again you can have a pH beyond that, but for most common purposes, pH 0 to 14 covers pretty much every normal situation. The pH of a solution approximates to the negative of the base 10 logarithm of the concentration of hydrogen atoms present in the solution measured in units of moles per litre molar concentration.