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

Rates of Reaction between Calcium Carbonate and Hydrochloric Acid.

Extracts from this document...


Rates of Reaction between Calcium Carbonate and Hydrochloric Acid Aim: To investigate the rate of reaction between calcium carbonate and hydrochloric acid. To do this I must change a variable to see what effect it has on the speed of the reaction. Possible variables include: the size (surface area) of the marble chips (calcium carbonate), the amount of marble chips, the amount of hydrochloric acid, the pH of the hydrochloric acid, the concentration of the hydrochloric acid, and the temperature of the acid. In my experiment I have chosen only to change the temperature of the acid. Equations: The word and symbol equations for the reaction between the calcium carbonate and hydrochloric acid are: calcium carbonate + hydrochloric acid ==> calcium chloride + water + carbon dioxide CaCO3(s) + 2HCl(aq) ==> CaCl2(aq) + H2O + CO2(g) Prediction: I can predict that my results will show positive correlation between the rate of reaction and temperature of the acid, so that as the temperature is increased, the rate of reaction shall also increase. This is because that for a reaction to occur particles must collide with sufficient energy (speed) to break the bonds within the reactant molecules and also form new bonds to produce the product. The higher the temperature of the acid, the more energy the particles will have, increasing the chances of a successful collision and allowing the bonds to be broken down and reformed more easily. ...read more.


I am using this range of temperatures because it includes 26�C which is room temperature, and I believe that this would be the most relevant result, and would also save time because I wouldn't have to heat/cool the acid to a certain temperature, as it would already be at room temperature. Firstly I shall put the 50ml measuring cylinder into the tub of water upside down, filling it with water in the process. Then I will put the tube attached to the bung in it. Then I will measure out roughly 1 gram of marble chips, and put them into the conical flask. I will then measure out 10ml of hydrochloric acid using the 10ml measuring cylinder and then heat it to the appropriate temperature using the water bath (or in the case of 16�C, cool it down in a fridge). I will then add the acid to the conical flask with the marble chips and immediately put the bung in it and start the timer. I shall then begin to take measurements every 30 seconds of how far the water level of the measuring cylinder has gone down. By doing this I will know how much gas has been produced from the reaction, because when it is produced it goes through the tube into the measuring cylinder, rises up through the water to the top and pushes the water downwards. ...read more.


Evaluation: Although the results of my experiment have proved conclusively that the hotter the acid, the faster the reaction will be, they are not firm enough evidence to show by exactly what amount. This is because my results seem to indicate that they are at least slightly inaccurate, because although there are few obviously anomalous results, the amount of gas produced still varies by several millimetres, indicating that many more results should have been taken and that the experiment could have been performed much more accurately. For example, the weight and size of the marble chips were not measured accurately, and were only made sure to weigh roughly 1 gram. To make this experiment more accurate I would have to spend much more time making sure all the marble chips were of exactly the same size and weight. Also, as I said in my analysis, I would allow my experiment to continue for longer until all possible reactions had taken place, so that I would be able to measure how the rate of reaction changes as more of the reactants are used up. To do this, I would have to use a much bigger measuring cylinder that could hold all the gas produced in the reaction without all of the water being pushed out. In fact, instead of using a measuring cylinder I could use a syringe as it would be easier and more accurate to read off. David Shuker DNE - A1 1 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. Investigate how concentration of hydrochloric acid (HCL) affects its reaction with calcium carbonate (CaCO3).

    This would allow UV rays from the sun the reach the experiment, warming up the conical flask and its contents. This would increase the rate of reaction. This could have caused the anomalous results. * Human error in the measurement of things in the experiment.

  2. Free essay

    Close Your Eyes

    She took a sip of the water and then shook her head. "I'm fine. It's just something I ate. Plus, we're getting into a nightclub for free and we're underage...I'm not gonna miss that am I?" "Hmm yer, it's pretty cool having a brother who's famous sometimes."

  1. Investigating making Epsom salts by varying the rates of reaction.

    You should stand up when conducting the experiment as it is easier to see and to do things. Precautions that need to be taken with accuracy: would be to make sure that the acid is measured out correctly, to the nearest centimeter as possible of course it can not be absolutely perfect as it is bound to be 1cm +/-.

  2. An Experiment to show the reaction between Hydrochloric acid and Calcium Carbonate

    Chemical reactions very often need extra energy to start it off. Some chemical reactions need heat like the reaction between hydrogen and oxygen. The minimum amount of energy needed to start the reaction is called the 'activation energy'. Unless the particles have enough energy to add up to the activation energy needed the reaction will not start.

  1. Investigation of the reaction between Hydrochloric Acid and Calcium Carbonate chips

    Why not the other variables Surface area- The surface area of the solid to be reacted (calcium carbonate) would be very difficult to measure and to be precise and I could only get the chips into rough categories ( Small and large)

  2. Investigating rates of reaction with the amount of carbon dioxide produced when various concentrations ...

    When catalysts are added to reaction they make the reaction easier by reducing the initial energy needed. With this background knowledge I know that higher temperatures will help increase the rate of reaction in two ways. Not only will it increase the speed of the particles and collision but it

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