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

Investigation into Varying Concentration of Hydrochloric Acid Effects its Rate Of Reaction with Calcium Carbonate

Extracts from this document...


Investigation into Varying Concentration of Hydrochloric Acid Effects its Rate Of Reaction with Calcium Carbonate Introduction Hydrochloric acid reacts with Marble (calcium carbonate) to produce calcium chloride, water and carbon dioxide. We can measure the rate of this reaction by measuring how quickly the carbon dioxide is produced. Ca Co3 + 2Cl --> Ca Cl + H2O + Co2 Prediction In this investigation we are going to change the concentration of hydrochloric acid. By changing this factor we are going to find out how varying concentrations of hydrochloric acid effects its rate of reaction with calcium carbonate. The change in concentration will show us if the higher or the lower concentration of hydrochloric acid effects the rate of reaction. I predict that the higher the concentration then the quicker the reaction. This is because in a higher concentration of hydrochloric acid there are more acid particles (reactant particles) to collide with calcium carbonate particles (marble particles). This means more collisions occur causing the reaction to occur quicker and produce more carbon dioxide. Preliminary Work To get the best results from this investigation we first needed to carry out a preliminary experiment. See preliminary write up called Measuring the rate of reaction between marble chips and hydrochloric acid. For the preliminary work we measured out 3g of marble chips and used 50ml of hydrochloric acid. ...read more.


We chose to take readings every 30 seconds because this would give a good picture of the rate of the reaction and using molars 0.5, 1 and 1.5 the measuring cylinder was full by 6 minutes and this length of time gave us enough readings to get a good picture about rates of reaction using varying concentrations of hydrochloric acid. One the cylinder was full whether 6 minutes had past or not we stopped the test. This is to show that some reactions are faster than others and makes the test fair. We did repeat experiments to make the investigation more reliable and this would show any errors that had occurred and let us work out average results. We did this experiment for molars 0.5, 1 and 1.5 of hydrochloric acid. We tried to use the exact amounts of hydrochloric acid and marble chips each time to make the investigation as reliable as possible. Results Results for Molar 0.5 Time (minutes) Volume of Co2 (cm?) Repeat Volume of Co2 (cm?) Average Volume of Co2 0 0 0 0 1/2 0 5 2.5 1 3 7 5 1 1/2 5 10 7.5 2 10 22 16 2 1/2 24 30 27 3 37 40 38.5 3 1/2 46 51 48.5 4 60 58 59 4 1/2 70 65 67.5 5 80 77 78.5 5 1/2 88 85 86.5 6 100 95 97.5 Results for Molar 1 Time (minutes) ...read more.


If you don't compare the averages then the results support my conclusion and prediction. This method was quite good to show the change in rates of reaction with varying concentrations. But a few things can go wrong such as not starting the stop clock at the exact time and sometimes bubbles escaped. Also there could be a delay in the carbon dioxide coming through the delivery tube as the conical flask filled up. The variations in room temperature could have also affected the results. There could have been difficulty in reading the volume of carbon dioxide and this could lead to errors in results. The chips used where not uniform size and this may cause a change in results between tests. If there was lots of smaller marble chips then the surface area is increased overall, there is more surface area for the acid particles to collide with. This means that the reaction will take place quicker. This is also the reason we didn't use the powdered calcium carbonate because the reaction took place to fast because of surface area. To improve this investigation we could try to make sure we use the same size marble chips and use a different more accurate measuring cylinder to give precise results. We could also do more repeat experiments and used more concentrations of acid. I could extend this enquiry by using more concentrations of acid and use different types of acid to give a wider range of results. ...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)

    reacting in 50cm3 of hydrochloric acid and recording the amount of carbon dioxide to be produced over a period of time. These results were compared, showing that the higher surface area from the small chips produced the highest rate of reaction.

  2. Chemistry Cwk Rates of reaction: Investigating One Factor Which Affects How Fast Calcium Carbonate ...

    19 19.5 16 15 15.5 12 11 11.5 50 21 22 21.5 19 17 18 14 12 13 55 24 25 24.5 21 20 20.5 15 13 14 60 25 29 27 24 22 23 16 15 15.5 65 29 32 30.5 30 25 27.5 17 17 17 70 33

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

    - I will have the conical flask on the retard clamp so that as soon as I pour in the small chips of calcium carbonate I can push the rubber bung in.

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

    In order to make a graph that will go by the time order, either the graph paper has to be altered, the graphs would have to be smaller because there are only 6 numbers instead of 10 or one would have to adapt the data to suit the graph paper.

  1. Free essay

    Close Your Eyes

    Forget? Forget? How was I supposed to forget? Not only had I slept with Danny's girlfriend. I'd fallen in love with her. Chapter 12 *Louise* At least a month had past now and neither the argument or that night with Dougie had been mentioned.

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

    0.0022 0.0032* 0.0028 0.0020 0.0021 0.0025 0.0022 0.00226 2.5 0.0026 0.0036 0.0036 - 0.0032 0.0031 0.0031 0.0030 0.00317 Conclusion Use scientific ideas to explain conclusions you draw from your evidence The results I obtained through my practical, I conclude that the higher the concentration of HCL, the greater the mass

  1. Investigating the rate of reaction between hydrochloric acid and calcium carbonate

    investigating a different variable that affects the rate of reaction for example gas. to improve my experiment I will measure the gas produced but keep time as the dependent variable and the independent variable will remain the same because I will still be investigating the effect that the concentration has

  2. An Investigation: Factors That Affect The Rate Of Reaction between Calcium carbonate and Hydrochloric ...

    the results, and if the acid spills it could be expensive to replace a new one. Same goes with the gas syringe. The reason we used a stand clamp is because the equipment were held steadily to increase the gas flow through the tubing.

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