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Universal Indicator, pH Comparison

Universal Indicator, pH Comparison

C027/9126

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47.4 MB (3.7 MB compressed)

3342 x 4962 pixels

28.2 x 41.9 cm ⏐ 11.1 x 16.5 in (300dpi)

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Credit

GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY

Caption

Universal indicator added to three test tubes containing different solutions (left to right): diluted hydrochloric acid (acidic), distilled water (weakly acidic) and diluted sodium hydroxide (alkaline). Universal indicator changes its colour depending on the pH of the solution. Red indicates a strong acid, yellow/orange indicates an acid, green is neutral, blue indicates an alkali, and purple indicates a strong alkali.

Release details

Model release not required. Property release not required.

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