Betekenis van:
potassium dichromate

Voorbeeldzinnen

1. Potassium dichromate
2. POTASSIUM DICHROMATE
3. ‘Potassium dichromate
4. potassium dichromate.
5. Sodium or potassium dichromate
6. Potassium dichromate solution.
7. chromates, e.g. potassium chromate, potassium or sodium dichromate
8. on risk reduction measures for the substances chromium trioxide, ammonium dichromate and potassium dichromate
9. Oxidation of the ethanol in the distillate by potassium dichromate.
10. Simple distillation of the liquid. Oxidation of the ethanol in the distillate by potassium dichromate.
11. Potassium dichromate can also be used as a reference substance for green algae.
12. Principle Simple distillation of the liquid. Oxidation of the ethanol in the distillate by potassium dichromate.
13. Dissolve 33,600 g of potassium dichromate, (K2Cr2O7), in sufficient quantity of water to make one litre of solution at 20 °C.
14. In the flask, place 20 ml of the titrant potassium dichromate solution (paragraph 3.1) and 20 ml of the 1:2 (v/v) dilute sulphuric acid (paragraph 3.4) and shake.
15. Carry out the titration of the iron (II) ammonium sulphate solution (paragraph 3.2) with respect to the potassium dichromate solution by placing in an identical flask the same quantities of reagents but replacing the 20 ml of distillate by 20 ml of distilled water. (This is the ‘control’ flask.)