What is the correlation between the concentration of Vinegar solution and its rate of reaction with Baking Soda

Introduction:

The vinegar + baking soda experiments is one of the most popular through the scholar experiments this is because the materials are simple to get and the experiment is not too complicated to make. What will happen is that the acetic acid (what makes the sour of vinegar) will react with the sodium bicarbonate (compound that is in the baking soda) to form carbonic acid, a double replacement reaction happens between the two. The carbonic acid will be unstable and will fall apart creating carbon dioxide and water. The gas that comes out (the carbon dioxide) will be key to this experiment because it will be thanks to this component that will allow knowing the rate of reaction between the vinegar and baking soda and how changing the vinegar concentration will change this rate of reaction.

Research Question:

What is the correlation between different concentration of vinegar in a vinegar solution and its rate of reaction with baking soda?

Variables:

Dependant: rate of reaction between the vinegar and the baking soda

Independent: concentration (percentage) of vinegar solution

Controlled: time, mass volume

Equipment:

Baking Soda Vinegar Water 200ml Graduated cylinder 10ml Graduated cylinder Pipe Cork 800ml Beaker 100ml Conical flask

Stop watch

Procedures:

1. Measure 20ml of 100% vinegar solution with the 10ml graduated cylinder and put it into the conical flask

2. Add 0.5g of baking soda to the conical flask

3. Cork the conical flask as fast as possible and start the stop watch to record the experiment

4. Every 5 seconds measure the volume of carbon dioxide in the 200ml graduated cylinder and record the results

5. Record every 5 seconds until 110 seconds have passed

6. Repeat the entire procedure with a 75% vinegar 25% water solution, 50% vinegar 50% water solution and finally 25% vinegar and 75% water solution.

Diagram:

Conclusion:

The reaction gave similar results in the volume of the carbon dioxide but the time that the reaction was taking was slower so at the end it will finish reacting maybe with the same volume of carbon dioxide given off but the time that the reaction was going to end varies significantly in fact the 100% vinegar solution had a very big difference in comparison with the 25% vinegar solution which after 110 seconds it could only reach an average of 29.4

This means that the concentration in the solution of the vinegar did change the rate of reaction and the less concentrated it was more time the reaction had to take in order to react completely.