Introduction

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.

Supplies

Before moving on towards the experiment, the process let us make a list of supplies. They are as follows:

Tools

• 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

Materials

• 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

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.