Question

Write a detailed method for conducting an investigation on surface area. The aim of the investigation is to investigate whether increasing the surface area of calcium carbonate will result in an increase rate of reaction with Hydrochloric Acid. Independent variable is surface area of quikeze. The thing I am going to change is changing surface area by breaking up the tablet into different sizes. The range is whole tablet, 1/2 tablet and 1/4 tablet. The dependent variable is time it takes to react. The thing I am going to measure is how long the experiment takes to occur. I will measure it by a stopwatch. Write down your step by step instructions of how you will do your experiment.​

Answer 1

Step-by-step explanation:

Here is a step-by-step method for conducting an investigation on the effect of surface area on the rate of reaction between calcium carbonate and hydrochloric acid:

Materials:

Calcium carbonate tablets (quikeze)

Hydrochloric acid solution (0.5M)

Stopwatch

Safety goggles

Measuring cylinder

Beaker

Spatula

Mortar and pestle

Procedure:

Put on safety goggles.

Measure 50 mL of 0.5 M hydrochloric acid solution using a measuring cylinder and pour it into a beaker.

Crush the calcium carbonate tablet into three different sizes (whole tablet, 1/2 tablet, and 1/4 tablet) using a mortar and pestle.

Use a spatula to transfer the different sizes of calcium carbonate tablets into separate beakers.

Start the stopwatch.

Pour the hydrochloric acid solution into each beaker containing the different sizes of calcium carbonate tablets simultaneously.

Observe and record the time it takes for the reaction to finish in each beaker, i.e., when the fizzing stops.

Repeat the experiment two more times to get more accurate results.

Record the data in a table.

Calculate the average time it takes for the reaction to finish for each different size of calcium carbonate tablet.

Plot a graph of the average time taken for the reaction against the surface area of the calcium carbonate tablets.

Analyze the data and draw a conclusion regarding the effect of surface area on the rate of reaction between calcium carbonate and hydrochloric acid.

Tips for accuracy and safety:

Use the same volume of hydrochloric acid solution in each experiment.

Make sure to crush the different sizes of calcium carbonate tablets into as equal pieces as possible.

Repeat the experiment multiple times to reduce any errors in measurement.

Always wear safety goggles to protect your eyes from the hydrochloric acid solution.

Dispose of the leftover chemicals properly according to your lab's regulations.