GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Methyl orange indicator. Methyl orange indicator changes its colour depending on the pH of the solution, it is red below 3.1 and yellow above 4.4. Here methyl orange is added to beakers with different solutions. Left to right: acidic (0.1 M hydrochloric acid, HCl), neutral (pH=7 buffer solution), alkaline (0.1 M sodium hydroxide, NaOH).
Model release not required. Property release not required.