The symbol pH stands for the "power of hydrogen." The pH of a solution measures how many hydrogen ions are present in a solution. The numbers on the pH scale tell whether a solution is acidic or basic.
Values for pH usually run from 0 to 14, with lower numbers representing extremely acidic substances and higher numbers delineating substances that are strong bases. Pure water has a neutral pH, which is 7. Concentrated hydrochloric acid is extremely acidic and registers at a pH of 0. A concentrated strong base, such as sodium hydroxide, or lye, has a pH of 14. The pH of substances is measured by using a pH meter or with red and blue litmus paper.Learn More
In chemistry, "GLC" stands for gas-liquid chromatography. Gas-liquid chromatography is a technique used in analytical chemistry for analyzing and separating compounds that can undergo vaporization without decomposition. A typical application of GLC is in testing for purity of substances.Full Answer >
Fresh milk has a pH value that is typically between 6.5 and 6.7, making it slightly acidic. A pH greater than 6.7 indicates that the udders producing the milk are inflamed by pathogens, and milk with a pH lower than 6.5 indicates heavy bacterial action and milk spoilage.Full Answer >
A solution with a pH of 3 is considered acidic. It is roughly the same level of acidity as lemonade or an apple, according to the U.S. Environmental Protection Agency.Full Answer >
The pH of NaOH is 14. NaOH, or sodium hydroxide, is a highly caustic substance and is an alkali, or base. Sodium hydroxide is a white solid at room temperature.Full Answer >