• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11

Investigate the factors, which affect the rate of reaction between Calcium carbonate and Hydrochloric acid.

Extracts from this document...

Introduction

Investigate the factors, which affect the rate of reaction between Calcium carbonate and Hydrochloric acid Background information In this investigation, which is about the different factors and their affects on the rate of reaction, we will be reacting calcium carbonate and hydrochloric acid. The equation for this reaction is: Calcium Carbonate + Hydrochloric acid --> Calcium Chloride + Water + Carbon dioxide CaCO3 (s) + 2HCl (aq) --> CaCl2 (aq) + H2O (l) + CO2 (g) We will be using hydrochloric acid because it is a strong acid and is fully dissociated when put in water. Hydrochloric acid forms when hydrogen chloride gas is dissolved in water. HCl(g) + H2O(l) --> H+ (aq) + Cl- (aq) In weak acids there is only a partial dissociation occurs, that is only some of the molecules split up into ions CH3COOH (l) + H2O (l) ? CH3COO- (aq) + H+ (aq) Variables In any reaction there are several factors, which could cause the reaction to speed up or slow down. The variables that may have an affect on this experiment are: * Size of marble chip- the size of the marble chip will affect our experiment because this dictates the surface area. The larger the surface area the more calcium carbonate lattice is exposed to the Hydrogen and chloride ions in the acid therefore there will be more collisions more will be successful so the rate of the reaction will be faster. * Concentration of hydrochloric acid- this is the proportion of hydrochloric acid in the solution. ...read more.

Middle

* Wear safety goggles because we are dealing with bleach * Tuck stools in to make sure mo-one falls in the lab * Put all bags under the table to make sure no-one falls * Never run in the lab * Always stand up when carrying out experiments so we can move away if we are in any danger * Carefully fill burette by using the filter funnel We will be able to get precise results because we will be using accurate equipment like the burette, electronic balance that measures up to 2 decimal places and the digital stop clock that will also give us an accurate result. Strategy of Results Here is the table we will record our results on Volume of hydrochloric acid (cm3) Volume of Distilled water (cm3) Time taken for 100 cm3 of carbon dioxide gas to be produced (s) Concentration of hydrochloric acid (gdm-3) Rate of reaction (1/s) 1 2 Av 50 0 40 10 30 20 20 30 10 40 To calculate concentration of acid in the solution: The concentration of the acid can be found by finding the ratio of acid to total solution and multiplying by the concentration of the acid in the stock bottle. 50/50 x 2 = 2 40/50 x 2 = 1.6 30/50 x 2 = 1.2 20/50 x 2 = 0.8 10/50 x 2 = 0.4 I will plot a graph of concentration against average time taken to produce a 100 mls of carbon dioxide. I will work out the average by adding my two results together and dividing by two. ...read more.

Conclusion

The other anomaly was 2.0M, which was 0.071 but should really be 0.081. This shows that during the experiment there were some errors. The points however do not deviate too far of the line of best fit so the evidence is still reliable. To explain these anomalous results I will go back to my result table. When I compare my replication of the experiment I find that 0.4M and 2.0M are not identical this suggests there were errors in my method. Again the difference is not significant to affect the reliability of my evidence. These errors could come about through human errors for example: * Weighing out the marble chips and trying to get them the same size from one run to the next. * I used burettes to make up the dilutions so these should be accurate. This is an instantaneous reaction; once the marble chips inter the dilution of acid the reaction between the two starts instantly. This caused some problems because there was a delay sometimes to get the stopper on the conical flask and some gas could have escaped by then. Both reactions should be in the flask and kept separate e.g have the calcium carbonate in a test tube or a divided flask. If I was to repeat the experiment I think I might get more information if I traced the reaction to completion. I was only studying the first few minutes of the reaction. I could use a larger measuring cylinder inverted in water I could then trace the reaction with the amount of water displaced from the cylinder. In conclusion my results are reliable as they support my prediction at the start. 1 By Colm Killough 12B ...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

    The Effect of Concentration on the Rate of Reaction between Hydrochloric Acid and Calcium ...

    3 star(s)

    A timer will be used to measure the amount of time the rate of reaction can produce 80cm of CO for each individual concentration. Fair Test I am changing the concentration of Hydrochloric acid in my experiment so all other variables must be kept the same, if they are not then they may interfere with my experiment.

  2. How does the concentration of acid affect the rate of a reaction with calcium ...

    This is roughly double the first amount collected, proving the theory that doubling X doubles Y. These results support my earlier prediction, as this is what I thought would happen when the concentration was increased. Evaluation The results collected are quite reliable as the experiment was repeated 3 times and

  1. Free essay

    How does Concentration affect the rate of reaction between Hydrochloric Acid and Calcium Carbonate

    50+ 50+ 50+ 50+ Preliminary Experiment 2 - Timing how long it takes for a solid to dissolve Concentration Hydrogen Peroxide Solution Time taken for tablet to dissolve 100% 1:25 80% 2:00 60% 2:19 40% 3:04 20% 5:20 Preliminary Experiment 3 - Measuring loss of mass Time (Sec)

  2. Measuring the Rate of Reaction between Hydrochloric Acid and Calcium Carbonate

    I predict that the higher the concentration the faster the reaction will take place this is because in a higher concentration there will more hydrochloric acid molecules per set volume. This means that there will be a higher chance of the calcium carbonate molecules colliding with the hydrochloric acid and reacting.

  1. Investigate the effect of changing the concentration of hydrochloric acid and the volume of ...

    390 6.5 475 420 7.0 480 450 7.5 480 480 8.0 510 8.5 540 9.0 570 9.5 600 10.0 Obtaining evidence The results of conducting the experiment are shown below: 0.5M Time (secs) Minutes Volume of CO2 produced (cm�) 0 0 0 30 0.5 3 60 1.0 5 90 1.5

  2. Prove that changing the surface area of calcium carbonate chips, either by increasing or ...

    I will prepare my stop clock so I am ready to start the timer as soon as I pour my calcium carbonate chips into the acid. When I am fully prepared I will remove the rubber bung, which will be covering the conical flask whilst I am setting up for safety reasons, (to avoid spilling it and hurting someone)

  1. How does varying the concentration of Hydrochloric acid in reaction with Marble chips affect ...

    Seeing that in the given experiment hours aren't used due to the experiments' speed minutes could be used in a metric system. Explanation on how to interpret these graphs: Minutes are written normally, 10 cells per minute, however in a minute there aren't 10 or 100 seconds, there are 60.

  2. Investigating how the concentration of acid affects the rate of reaction between hydrochloric acid ...

    loss in a given period of time therefore the higher the rate of reaction. According to my line graph showing the mass of CO2 produced, we can clearly see that the amount of CO2 produced decreased as the reaction progressed.

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