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 and a content creator. He has special interest in science experiments and teaches the same to school and college students. He is also a technical lead at RUDE LABS PVT. LTD.