Credit: RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA/SCIENCE PHOTO LIBRARY

Caption: Sample of a buffer solution (pH 7) being poured from a measuring cylinder into a beaker. The green colour is due to universal indicator. A buffer is a solution that resists changes to its pH. Typically it contains a weak acid and a salt of the acid, and the equilibrium between them adjusts when acid or alkali is added, maintaining a constant pH.

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Keywords: acid, acidity, alkaline, alkalinity, beaker, buffer, buffering, chemical, chemistry, demonstration, education, glassware, green, measuring cylinder, neutral, ph, pour, pouring, solution, ui, universal indicator

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Neutral buffer solution

K004/0906 Rights Managed

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Duration: 00:00:13

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 293.6M

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Capture format: Sony FS700

Codec: H.264

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