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.
Saquib Siddiqui is a Mechanical Engineer with expertise in science projects and experiments. Saquib’s work focuses on integrating scientific concepts with practical applications, making complex ideas accessible and exciting for learners of all ages. In addition to his practical work, Saquib has authored several articles, research papers, and educational materials.