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Title: Universal indicator paper
Caption: Universal indicator paper. Universal indicator changes its colour depending on the pH of the solution. Here, left indicator strip has been immersed in an acidic solution (pH=2, 0.01M hydrochloric acid, HCl), centre strip has been immersed in a neutral solution (pH=7 buffer solution), and right strip has been immersed in a basic solution (pH=12, 0.01M potassium hydroxide, KOH).
Credit: Album / Turtle Rock Scientific/Science Source
Image size: 3432 × 5160 px | 50.7 MB
Print size: 29.1 × 43.7 cm | 1351.2 × 2031.5 in (300 dpi)