Question: Gentian Violet for fingerprinting is a banned substance now and is not procurable any more. Are there any alternatives? Answer: 1. On wood in silver nitrate. 2. Finger prints on filter paper in iodine chamber. Use a fume hood. Put fingerprints on filter paper and attach a paper clip and cotton thread to it,…
Advice
Fats and oils testing (emulsion test):
Add ethanol to a very small amount of the substance to be tested. Shake or crush to dissolve. In tough cases it can be warmed gently in a water bath. Filter or dilute if necessary to obtain a fairly clear liquid, which is the solution of fat in ethanol. Pour this solution into a test…
Esters experiment alternative:
Question: Can you please tell me the details of the experiment where you use jelly beans in lieu of esters? Answer: Esters – A Tasty Investigation (This activity compliments the Experiment 32 in STAWA Year 12 ATAR Exploring Chemistry Laboratory Manual). Key Ideas:Alcohols and carboxylic acids react to form esters. Esters have pleasant odours and…
Coke and Mentos:
Use Home Brand diet cola, warmed, and original Mentos that have been kept in the fridge overnight. Professor Bunsen also offer a great delivery system available for purchase but you can make your own.
Chlorine and Bromine water production:
Both of the following procedures MUST BE CARRIED OUT IN A FUME HOOD CHLORINE WATER Measure out 40ml of household bleach (do not use the expensive variety of bleach that has been thickened) Add 40mL of 1M sulfuric acid and then dilute with water to 100mL BROMINE WATER Take the prepared chlorine water and add…
Alka Seltzer alternative for solubility practical:
For solubility activity, try using denture cleanser tablets, which are more economical than Alka Seltzer.