• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

An experiment to find out how changing the surface area of the marble chips affects the rate of reaction

Extracts from this document...

Introduction

Chemistry Coursework An experiment to find out how changing the concentration of acid affects the rate of reaction An experiment to find out how changing the concentration of acid affects the rate of reaction Planning Aim: I am to find out how changing the concentration of the hydrochloric acid (HCL) affects the rate of reaction. The hydrochloric acid will be reacting with marble chips (small, medium, large). During my experiment I will be changing one variable. This will be the concentration of the acid. I will use the concentration of HCL from 0.5 molar/dm3 to 3.0 molar/dm3. I will use 3grams of marble chips for every size of chip. By doing this I will find out if the rate of reaction is quicker or slower using a different concentration of acid. The equation I will be using is: CaCO3 (s) + 2HCl (aq) � CaCl2 (aq) + H20 (l) + CO2 (g) Calcium Hydrochloric Calcium Water Carbon Carbonate Acid Chloride Dioxide Method Firstly I must get the correct equipment and assemble it safely and correctly. ...read more.

Middle

This is because the two types of molecule can only bump into each other at the liquid solid interface, i.e. on the surface of the solid. So the larger the surface area of the solid, the faster the reaction will be. Smaller particles have a bigger surface area than larger particle for the same mass of solid. There is a simple way to see this. Take a loaf of bread and cut it into slices. Each time you cut a new slice, you get an extra surface onto which you can spread butter and jam. The thinner you cut the slices, the more slices you get and so the more butter and jam you can put on them. This is "Bread and Butter Theory". By chewing your food you increase the surface area so that digestion can go faster. The effect of Surface Area - Solid particle size * If a solid reactant or a solid catalyst is broken down into smaller pieces the rate of reaction increases. * The speed increase happens because smaller pieces of the same mass of solid have a greater surface area compared to larger pieces of the solid. ...read more.

Conclusion

From looking at my background information and my knowledge of reactions I predict that the larger the concentration of the marble chips, then the quicker the reaction will be. This happens because there is more of the reactant which comes in contact with the acid causing a quicker reaction. Although I predict that the larger chips will react quickest, I believe that the medium marble chips and a molar of 2.5 will be the quickest and most effective. This is because if I use 3.0 molar acid with large marble chips, the reaction will be too quick to record. Safety I will be using acid during this experiment, therefore I will be wearing safety goggles. I will stand up when doing the test and leave all bags under the table and out of the way. Conclusion I feel my experiment went very well with no major incidents. A few things that I could have changed are: * Taken more care with the water as there were spillages. * Measured out the exact amount of grams of marble chips, because I could not always measure the same amount on every experiment. My results were scientifically correct and matched my prediction. ?? ?? ?? ?? David Holmes 10JB 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Patterns of Behaviour essays

  1. Marked by a teacher

    In this investigation we are going to measure the rate of reaction of marble ...

    3 star(s)

    140 38 15 70 160 43 18 79 180 48 19 85 200 53 22 90 220 56 23 95 240 60 25 100 260 65 27 100 280 68 28 100 300 70 30 100 Analysis In this set of preliminary results we measured the rate of reaction between

  2. An investigation into how surface area affects the rate of reaction.

    On the other hand, cooling has the opposite effects and the chances of successful collisions are reduced. Cold Hot Surface Area: A smaller piece within a large surface area means more areas of contact, resulting in an increased number of collisions and, so, an increased reaction rate.

  1. Investigation into the digestion of milk by Trypsin.

    showed inverse proportion the reciprocal of one factor against the other should show direct proportion). A graph of rate of reaction against temperature is also preferable to a graph of time against temperature as it is possible to plot the figures for experiment carried out at 0 and 80 degrees

  2. Experiment to investigate how changing the concentration of hydrochloric acid affects the rate of ...

    decimal places * Safety glass Diagram of set up experiment Method * I will display a balance and plug it to the electricity. Next to the balance I will display a beaker that can hold 500ml. * I also have to get the hydrochloric acid of 2M which is in a big bottle and the cylinders of chalk.

  1. An investigation into how surface area affects the rate of reaction

    At a low concentration, there are less acid particles in a certain volume. Therefore there is a lower chance of a collision because there are less acid particles. Because there are fewer collisions, the rate will decrease. An increased concentration means more particles.

  2. An Experiment To Investigate The Relationship Between The Surface Area And Rate Of Reaction

    As more collisions will occur in a given time the rate of reaction should increase with surface area to volume ratio. However the surface area to volume ratio will be greater for small particles than larger ones as in a large particle the majority of the atoms are not exposed to the solvent outside.

  1. Investigate how concentration affects the rate of a reaction using marble chips (CaCO3 ) ...

    We checked that the water we used was at the same temperature for each experiment as this could have affected our results by causing the water particles (if the water was warmer) to have more energy making them move about more and increasing the chance of gas particles bumping into

  2. The effect of surface area on the reaction rate between marble chips and hydrochloric ...

    For each size of Marble chips I repeated the experiment twice and took an average, I measured the gas every 30 seconds. Preminary Study: - I've tested using two molar Hydrochloric acid with Marble chips but I couldn't even take the reading every Bhaktipriya Nayan Kapadia- Chemistry coursework Minute.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work