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

An Experiment to investigate whether the concentration of HCl affects the rate of reaction with CaCO3

Extracts from this document...


An Experiment to investigate whether the concentration of HCl affects the rate of reaction with CaCO3 PLANNING Aim: My aim for this experiment is to find out if the concentration affects the rate of reaction between CaCO3 & HCl. Prediction: I predict that the high molarity concentration solution will have a much faster rate of reaction than the weaker solution. I have predicted this from my knowledge of a previous experiment and scientific knowledge. Recently I did a similar experiment involving a sodium thiosolphate cross instead of the calcium carbonate, from this I found that the higher concentration solutions, faster the reaction, therefore I believe the same results may occur. The speed of the reaction was proportional to the concentration of the reactant, which I predict, will also happen in our experiment. I think that this happened because the more HCl in the solution the greater the concentration and there will be more particles colliding and more energy and therefore a faster rate of reaction. The reason I think that the rate of reaction will increase is that the experiment is exothermic, this means that it will give itself more energy and therefore more collisions and faster collisions. Also in the 2.0M solution compared with the 0.5M solution there are much more HCl particles in the same volume so the are going to collide with each other more often. ...read more.


Concentration Concentration is a very important factor in rates of reaction. The concentration of a solution can greatly effect a reaction this is because there will be more particles of the reactant to react with, which will increase the time taken for the reaction. If the concentration of an acid is increased, the rate of reaction will increase because the collision rate would be higher and the amount of CO2 would be given out more quickly. Below is an example graph as you can see that the high concentration will react: Temperature The higher the temperature the more energy each particle will have which means it will vibrate more, causing the amount of collisions to increase. As the particles collide more than usual at a high temperature then it will have a high chance of reacting, this will increase the rate of reaction. Below is a graph of how temperature and the rate of the reaction are related: Activation Energy Activation Energy is an amount of Energy needed for a reaction to occur, this amount varies from different elements and type of reaction. This may save energy for industrial use, as they will only supply the amount of energy needed exactly and not more. The Collision Theory From the kinetic theory of gases, the collision theory of bimolecular reactions in a gas phase was developed. ...read more.


In addition, I will use a clock to measure the rate of reaction from as soon as the reactants are put together. The measurements will all be taken to 2d.p. to ensure they are all fair. Risk Assessment I will wear safety glasses to protect my eyes from any accidents that may occur. Lab coats will be worn to ensure clothes stay free from unwanted stains. I will also have to check the apparatus for any broken pieces, that way; I can avoid injury to myself or avoid a mistake in my experiment through a leak. The most important thing is safety. Also, with the stronger molarity solutions, they may be corrosive, so I must take care not to spill any onto bare skin. Fair Test We must make sure that we use the same size and roughly the same mass of chips, this is because we want to keep the chips roughly the same all the way through the experiment so that it will be a fair test and the results we be in relation to each other, otherwise the results will be completely different to what we will expect and it will ruin the experiment. We must also take our readings at the same intervals throughout the experiment i.e. I will take a reading every thirty seconds for all of my experiments. Empty Results Table Distilled Water Time taken (seconds) Volume of CO2 collected in beaker(cm3) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 ...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. How Concentration affects the rate of reaction.

    This shows that the reaction rate is very slow which results in a very long time for the cross to be obscured (about 201 seconds). Conclusion After carrying out experiments, drawn graphs and having researched I have made a conclusion about how the concentration of one reactant affects the rate of reaction.

  2. Investigate how concentration of hydrochloric acid (HCL) affects its reaction with calcium carbonate (CaCO3).

    Catalysts do not take part in the reaction, do not get 'used up' and can be used again. A positive catalyst speeds up a chemical reaction by encouraging bond breaking. Because the activation energy is lowered, the particles need less energy to react and the reaction rate increases.

  1. Free essay

    Close Your Eyes

    He followed me up the stairs, occasionally taking my hand and making me turn round just so that he could kiss me, when we finally reached his bedroom. Without even taking in our surroundings I pulled him towards me and kissed him passionately.

  2. To investigate how particle size affects reaction rates

    concentrated, it means that there are lots of key reacting particles in a certain volume, than if you had a less concentrated, weaker, solution. In a less concentrated solution, there are fewer reacting particles, and more water particles that are less important in the reaction.

  1. An Investigation to determine the factors which affect the rates of reaction between Marble ...

    acid and a carbonate can be greatly increased by making the carbonate a powder rather than lumps. As the surface area of the particles is greatly increased and hence there are more chances for the acid particles to successfully collide with the carbonate particles A large particle means that there

  2. Investigation to discover the affect of varying concentrations on the rate of reaction of ...

    The acid does not dissolve the limestone chips it reacts with them as two separate reactants; the shape of the chips stays the same but after the experiment they cannot be used again because the acid would have used all the potential reactant energy to make the gas substance.

  1. Find out if the concentration effects the rate of reaction between CaCO3 & HCl.

    We could try using one single lump or powder and see which reaction would take longer. Below is an expected graph for three different sized chips of CaCO3 reaction with the HCl: One point to note be that the factors do not effect the amount produced but only speed up the rate of the reaction.

  2. How does the concentration of HCl affect the rate of reaction with CaCO3?

    * Surface area- You can increase surface area by making solids into powders by crushing or grinding them, this allow more of the other reactant particles to react with powdered reactant particles because there would be more area for the other reactant to attack, but if the reactant was a

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