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

To investigate the rate of reaction I have decided to use this experiment. I am going to use Marble Chips and Hydrochloric Acid.

Extracts from this document...


Chemistry AT1 - Rates of Reaction To investigate the rate of reaction I have decided to use this experiment. I am going to use Marble Chips and Hydrochloric Acid. I will change the concentration of the hydrochloric acid each time, and I will measure how quickly the upturned measuring tube will be filled up with carbon dioxide. Prediction I think that the higher the concentration of hydrochloric acid the faster the carbon dioxide will be given off. I think this because the higher the concentration of acid molecules the more particles available to react. Also the higher the concentration of acid particles the more chance of a particle having enough activation energy. The more particles available at any one time with enough activation energy means that in a given time more of the product is produced, or it takes a less amount of time to produce a certain amount of product, in this case Carbon Dioxide. The activation energy is the amount of energy needed to make the two particles react. ...read more.


Weigh out 10 grams of the marble chips; use the same weight each time for each of the molarities. Place the chips into the conical flask and insert the bung. As the reaction takes place bubbles should start to come out of the delivery tube into the upturned measuring cylinder. From the first bubble measure how long it takes for the upturned measuring tube to fill up with gas. Record the result and refill the upturned measuring cylinder with water, wash out the conical flask and weigh out the next lot of marble chips. Repeat the experiment but each time using a different concentration of acid 0.5M more each time until you get to 2M and as you will need 5 different concentrations you can do 1.25M or 1.75M acid aswell. You may want to repeat the experiment three times to get a more accurate average for each concentration. Fair Test - Controlling the Variables * What I will keep the same - Each time I repeat the experiment I will keep the temperature, surface area of the marble chips, amount of acid used and the amount of carbon dioxide to be collected the same. ...read more.


If my results had been more accurate I think the results would show the concentration of the acid and the rate of reaction to be proportional. The graph also supports my prediction. On the graph, the steeper the curve, the faster the rate of reaction. Evaluation Overall I am pleased with my results and the way the experiment was carried out. I think my results were fairly accurate and proved my hypothesis. To make the overall experiment results more accurate we repeated it three times and then took the average. If I were to do this experiment again I would probably make it more accurate by using smaller particles of marble chip so I could match up surface area and weight more accurately each time. I would like to then see if the concentration of acid is proportional to the rate of the reaction. Some other areas in the experiment that I feel I could have improved on were factors like, controlling the stopwatch. There is a lot of human error here. But the inaccuracies due to them were minor because I paid close attention to these during the experiment. ...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 project I am going to investigate rates of reaction of an indigestion ...

    3 star(s)

    To ensure that this is a fair test, there should only be one variable, temperature. Therefore the temperature of the acid is the only thing that I should change. I should try to keep the volume of acid the same (by using a burette), keep the concentration of acid the

  2. Chemistry Rates Of Reaction Marble chips and Hydrochloric acid

    Also the points on my graphs would get steeper the faster the reaction. I think my graphs will in general show positive correlation. This would support my other prediction of the lines getting steeper the stronger the acid. In summary: - As we are neutralising something I think it will bubble and fizz.

  1. To investigate the factors which affect the rate of reaction between marble chips and ...

    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.

  2. An Experiment To Investigate The Rate Of Reaction Between Marble Chips And Hydrochloric Acid.

    A preliminary experiment showed that the reaction between 5 marble chips weighing 3g in total and 20ml of acid produced 20cm3 in 18.50 seconds. When the same amount of chips reacted with 5ml of acid and 15ml of water, it took 85.56s, which showed a large enough difference so that each concentration could be easily distinguished from one another.


    The two product molecules formed fly outwards. Collisions between molecules will be more violent at higher temperatures. The higher temperatures mean higher velocities. This means there will be less time between collisions. The frequency of collisions will increase. The increased number of collisions and the greater violence of collisions results in more effective collisions.

  2. Investigating the rate Of reaction between Acid and marble

    Weigh out 2 grams of the small marble chips using the top pan balance and place these chips on the paper towel 3. Put the weighed marble chips to one side and pour any amount of acid into the burette making sure the tap is closed afterwards 4.

  1. An experiment to investigate the reaction between marble chips and HCl

    will take the same time to place the bung into position in each case and therefore remain a constant. I could place the bung each time after exactly 1 second has passed; this will ensure that the test is fair in all experiments.

  2. To investigate the effect of change concentration on the rate of reaction between marble ...

    Collision Theory The reaction being considered here is between marble chips and Hydrochloric acid. The reaction is: CaCO3(s) + 2HCl (aq) CaCl2(aq) + H20(l) + CO2(g) To find the ionic equation Ca2+ + CO32- + 2H+ + 2Cl- Ca2+ + 2Cl- + H20 +CO2 Now we will cancel out all

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