In the Scientific world, the oscillating reactions can be dramatic, and it helps to understand chemistry excitingly. But there’s no doubt that it is a tedious job to experiment. In today’s practical, we will demonstrate an oscillating chemical reaction.
Before moving on towards the experiment, the process let us make a list of supplies. They are as follows:
- Eye protection (goggles)
- Disposable gloves (preferably nitrile) (optional)
- One Beaker with dm3 Magnetic stirrer
- Weighing boats or watch-glasses, x3
- Balance, reading to 0.1 g
- Concentrated sulfuric(VI) acid, 75 cm3
- Propane-1,3-dioic (malonic) acid (HARMFUL), 9 g
- Potassium bromate(V) (TOXIC, OXIDISING), 8 g
- Manganese(II) sulfate-1-water, 1.8 g
- Deionized or distilled water, 750 cm3
Steps To Demonstrate An Oscillating Chemical Reaction
Step 1: Firstly, take a beaker and pour distilled water about 750cm3
Beaker filled with distilled water
Step 2: Slowly start stirring by adding 75 cm3 of concentrated sulphuric acid. Let the mixture heat till 50 0C.
Adding and stirring with sulphuric acid
Step 3: Now, let the acid cool till room temperature.
Cooling the Acid
Step 4: Weigh 9g of propane-1,3-dioic (malonic) acid then weigh, 8 g of potassium bromate(V) and 1.8 g of manganese(II) sulfate-1-water on a measuring scale.
Weighing malonic acid, of potassium bromate(V) and manganese(II) sulfate
Step 5: Take the Beaker filled with dilute sulphuric acid on a magnetic stirrer and start to string the solution quickly.
Stirring the solution
Step 6: After stirring, add the malonic acid and potassium bromate(V).
Add the malonic acid and potassium bromate(V)
Step 7: When everything is dissolved, add manganese (II) sulfate and observe.
Adding manganese (II) sulfate
Step 8: You will notice a red color, and it will disappear within one minute.
Red color liquid
Step 9: The red color will oscillate from red to colorless after some period which will complete oscillation.
Oscillating Chemical Reaction
Things To Remember
- Make sure you use a clean beaker for the experiment.
- Make sure you add the chemicals according to the measurements.
An Indian nuclear physicist, founding director, and professor of physics at the Tata Institute of Fundamental Research.