Betekenis van:

Zelfstandig naamwoord
  • lakmoes
  • a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator




  1. Since primary school we've been checking for the qualities known as acidity and alkalinity with litmus paper.
  2. When investigating the pH (acidic, neutral, alkaline) of a liquid, don't soak the litmus paper completely in the liquid but just put the end of the paper in it.
  3. Acid to litmus
  4. Neutral to litmus
  5. pH of a 1 % colloidal solution Neutral to litmus
  6. Acidity of a 5 % solution: neutral or slightly alkaline to litmus paper
  7. The solution must be alkaline to litmus paper; otherwise add some magnesium oxide (3.2).
  8. pH of a 1 % colloidal solution Neutral to litmus Arsenic Not more than 3 mg/kg Lead
  9. Run out the excess acid to just above the resin surface and wash the column with water until the effluent is neutral to litmus.
  10. 1 g dissolves in 2 ml of cold water forming a solution which flows readily and is acid to litmus, insoluble in ethanol
  11. The white precipitate formed by acidifying with hydrochloric acid a 10 % (w/v) aqueous solution of the sodium derivative of methyl p-hydroxybenzoate (using litmus paper as indicator) shall, when washed with water and dried at 80 oC for two hours, have a melting range of 125 oC to 128 oC