Chemistry coursework rate of reaction + evaluation

Put the filter paper back into the test tube with the bottom of the paper in the water and the black band above the water. Observe what happens as the liquid travels up the paper. Record the changes you see. When the solvent has reached the pencil line, remove the paper from the test tube.

Measure how far the solvent traveled before the strip dries. Finally, let the strip dry on the desk. With the metric ruler, measure the distance from the starting point to the top edge of each color. Record this data in a data table.

Chemistry Rate of Reaction Coursework for Calcium Carbonate and Hydrochloric Acid

Calculate a ratio for each color by dividing the distance the color traveled by the distance the solvent traveled. How many colors separated from the black ink? Five colors separated from the black ink: yellow, pink, red, purple, and blue. What served as the solvent for the ink?

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Water served as the solvent for the ink. As the solvent traveled up the paper, which color of ink appeared first? The color orange first appeared as the solvent traveled up the paper. List the colors in order, from top to bottom, which separated from the black ink. The colors separated in this order, from top to bottom: blue, purple, red, pink, and then yellow.

From your results, what can you conclude is true about black ink? Black ink is a mixture of several different colors. Why did the inks separate?

The inks separated because the black ink was a mixture of different pigments with different molecular characteristics. These differences allow for different rates of absorption by the filter paper. Why did some inks move a greater distance? The ink least readily absorbed by the paper would then travel the farthest from the starting mark. You can conclude from this information that the different pigments were absorbed at different rates. Error Analysis Possible errors could include inaccurate measurements of the distances traveled by the inks and mistakes when calculating the ratio traveled by the water and colors.

If a longer test tube was used, a longer strip of filter paper could have been used. This may have changed the ratios. Another color may have been present, but not detected because of the filter paper length. Conclusion The proposed hypothesis was correct. The paper chromatography did show that black ink could be separated into various colors. The black ink gets its color from a mixture of various colored inks blended together. The first color of ink to appear on the filter paper was yellow followed by pink, red, purple then blue.

The colors separated the way they did because of the differences in their molecular characteristics, specifically, their solubility in water and their rate of absorption by the paper. When fuel goes though the carburettor the fuel gets made into a mist, which is far more explosive than just a drop of fuel. The graphs both show that all of the experiments were very similar. The large surface area experiment when significantly quicker than the other 2.

With an average of minutes for reaction rate it smashed the other 2.

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The reaction mainly happened in the first 15 seconds and then slowed down a lot, but it was still fizzing. The other 2 experiments were fizzing the whole time with no increase or decrease in speed with fizzing. We stopped the experiment at 10 minutes as it was taking too long for the experiment to end, but there was defiantly a decrease in size. The small surface area experiment was a very slow reaction compared to the large surface are reaction.

Its bubbles were big and not aggressive at all. We also had to end this experiment at 10 minutes because it was taking too long.

The Experiments went according to plan, and there were no mishaps. Having 3 experiments going at once saved us a lot of time, and having all of the calcium carbonated crushed up and ready to go also saved us lots of time, which worked well. Our group went together like peas and carrots.

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If I was to repeat this experiment again I would use less calcium carbonate and a stronger hydrochloric acid, so that we could get a time for each experiment instead of ending the experiment at 10 minutes. This also would have given us a better understanding of how surface area affects the reaction rate.


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When the surface area is increased between calcium carbonate and hydrochloric acid, the reaction rate is sped up. The hypothesis was supported by the results in the experiment.

The results showed that the research and hypothesis were all accurate, and the results were that the larger is surface area is the fast it will react. The small the surface area was, the slower the reaction was, but the experiment did have some mishaps, which can be easily be tweaked to be the perfect experiment. But the experiment was successful in finding the result we were looking for, not only because of chemical reason but because of how our group worked together as well. The effect of surface area on rates of reaction.

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Collision Theory. If you are the original writer of this essay and no longer wish to have the essay published on the UK Essays website then please:. Essays Chemistry. Title: The effect of surface area in an experiment. Chosen factor: effects of surface area Chosen experiment: Calcium carbonate and Hydrochloric acid option 2 Questions: Will increasing the surface area of the calcium carbonate slow down the reaction rate? How do you increase the surface are of Calcium Carbonate? Will increasing the surface are of Calcium Carbonate speed up the reaction rate?

Will the smaller surface area Calcium carbonate have a faster reaction rate than the larger surface area Calcium carbonate? Background Information: What is a reaction rate? A reaction rate is the rate in which a chemical reaction occurs. Diagram sourced off BBC, This diagram shows the reaction rate of a greater surface area blue is much faster than the smaller surface area red. Method: Collect all equipment needed for the experiment. Setup should look like this: Start timer and record results in a table as shown below.

Aim: The aim of the experiment was to find out if a larger surface are has a faster reaction time than a smaller surface area.

Chemistry Rate of Reaction Coursework for Calcium Carbonate and Hydrochloric Acid

Chemical spillage To not run with chemicals, and watch what you are doing with your body parts. Chemical contact with skin or cuts Wash out thoroughly Results: 1 st experiment: Surface area: Time: Observations: Clarity: Large mins Bubbling reaction, slowly dissolving, sizzling noise, long time to dissolve, white bubbles. Evaluation: The Experiments went according to plan, and there were no mishaps.

Conclusion: When the surface area is increased between calcium carbonate and hydrochloric acid, the reaction rate is sped up. Reference list: Bbc. Essays, UK. November