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

How Does Rate of Concentration Affect the Rate of Reaction Between Marble Chips and Hydrochloric Acid?

Extracts from this document...

Introduction

How does rate of concentration affect the rate of reaction between marble chips and hydrochloric acid? Introduction We are going to investigate how the rate of reaction differs using varying concentrations of hydrochloric acid with marble chips. Prediction I think that the higher the molarity of the hydrochloric acid, the faster the reaction will occur because the less water molecules means the chances of acid and calcium carbonate particles colliding is greater. (If the acid was more dilute, it would contain more water molecules, meaning it would take longer for the particles to react with each other because the odds are reduced of them colliding. Planning CaCO3 + 2HCl(aq) CaCl2 (aq) H2O (l) + CO2 (g) Calcium + Hydrochloric Calcium Water + Carbon Carbonate Acid Chloride Dioxide To ensure a fair test, the following must be considered: * Temperature - to keep it the same or change it, reactions go faster under a higher temperature because the heat provides the particles with energy so they move faster and the collision factor is increased. However our experiment is to see if concentration affects the rate of reaction, not temperature so it must be kept as a controlled variable. ...read more.

Middle

However, a couple of anomalous results occurred, but were included into the averages that were plotted on the graph, because although they don't fit with the other results, it could be that my results that seemed to be normal were actually the abnormal ones and the 'anomalous' was not, even if that wasn't the case they were still included. These may have occurred because of the order that the concentrations were done in, the same concentration were not always in canon, and sometimes the acid from before would speed up or create a delay in events, but it was only a small amount coating the sides of the conical flask. Another reason for this was maybe because of this reason, after using 2M acid I washed the flask out with water, which is neutral and some was left in the bottom and coated the inside, so the acid was neutralized for a while before it could take affect on the marble chips. Evaluation I feel that to make the collection of data more accurate, taking readings of amount of gas produced at regular time intervals would have been better, so that individual graphs could be compared to others of different concentrations. ...read more.

Conclusion

would be altered and not be a fair test anymore. (We may even have to find this out for ourselves) In contrast to raising the temperature, would it not be inversely true that if you decrease the temperature, the rate of reaction also lowers. In reality we do this every time we put something in the refrigerator and harness this knowledge to our advantage. If you want to see the effect of elevated temperatures increased reaction rates you can leave some dairy product out of the refrigerator for a few days and compare its condition with the same age dairy product that was kept cold. However this is quite unscientific as it is immeasurable and the open room cannot be controlled it is open to whatever is in the air. This experiment would be more of a biology experiment because it is encouraging bacterial and microbes that secrete chemicals and toxins, so it is not strictly a chemistry experiment. Another variation on the experiment we did is to use a base and acid, such as magnesium and hydrochloric acid, again to use particle size would be a waste of time because there is no scale of variation because the magnesium comes on a roll and is quite thin, the independent variable could be temperature or concentration of the acid. Elisa Holbrook 08/05/07 P1 ...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)

    Here is the table of results for this experiment to show the differences in the large and small chips: Time (Seconds) Large Marble Chips (g) Small Marble Chips (g) 0 0 0 15 2 10 30 12 23 45 22 40 60 33 60 75 47 75 90 55 95

  2. Marked by a teacher

    In this investigation we are going to measure the rate of reaction of marble ...

    3 star(s)

    We decided to do it for 20 seconds because we know that some of the reactions would be slower than others and the volume of gas needs to be noted quite often Variables and constants In our investigation the things kept constant will be; the mass of marble chips (0.5g), the volume of hydrochloric acid (20cm�), the equipment.

  1. How the temperature affects rate of reaction between marble chips and hydrochloric acid?

    3 Average: 20 35 45 55 65 Pilot Test I am now going to construct a pilot test to my method. In addition, I am going to carry out the method to see if I need to make any changes.

  2. Experiment to investigate how changing the concentration of hydrochloric acid affects the rate of ...

    0.07 230 370.29 0.02 271.95 0.04 272.37 0.04 97.73 0.08 361.41 0.08 101.36 0.08 240 370.18 0.11 271.93 0.02 272.34 0.03 97.62 0.11 361.34 0.07 101.22 0.14 Total 1.71 0.77 0.83 Total 1.63 1.19 1.02 Average 1.10 Average 1.28 I have highlighted the anomalies in red.

  1. How does changing the concentration of the Hydrochloric acid affect it reactions with Magnesium?

    I therefore conclude that: 1. The initial rate of reaction increase as the concentration of the acid increases 2. There is a fourfold increase in the rate of reaction as the concentration increases 3. As the concentration doubles the initial rate of reaction is approximately squared My original prediction was

  2. Investigation of the reaction between marble chips & dilute hydrochloric acid.

    Endothermic and exothermic are not the factors that change the rate of reaction, is the activation energy is an important factor in terms of temperature and reaction speed. ==> Low temperature High temperature Concentration affecting the rate of reaction The concentration of acid hugely affects the rate of reaction.

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

    The temperature is always room temperature. Fair Test My experiment will be a fair test as I have use the same equipment and I will use a measuring cylinder to ensure that I measure out the same quantity of acid each time. I will use the same mass of chips so that there are not varying

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

    As the acid becomes more and more concentrated the time for the gas to collect should get quicker, as there are more particles to collide and react, while a weaker concentration means there are fewer particles to react and so should take longer.

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