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

Investigate How the Concentration of Hydrochloric Acid Affects the Rate Of Reaction, when Reacted with Marble Chips

Extracts from this document...


An Experiment to Investigate How the Concentration of Hydrochloric Acid Affects the Rate Of Reaction, when Reacted with Marble Chips Planning I am conducting an experiment to investigate how the concentration of hydrochloric acid affects the rate of reaction, when reacting hydrochloric acid with marble. Calcium Carbonate Hydrochloric Acid Calcium Chloride Carbon Dioxide Water CaCO3 (s) 2HCl (aq) CaCl2 CO2 H2O There are many different factors to take into account. These factors consist of; the temperature of the reactants, the surface area of the marble, the volume of hydrochloric acid, the mass of marble, the concentration of hydrochloric acid and also whether catalysts are present or not. I have chosen to investigate the concentration of the hydrochloric acid, and so all the other factors must remain constant, because of the possibility of the factors affecting the rate of reaction, which would cause bias. To keep the temperature constant, I will put the test tube containing the reactants in a water bath, which will remain at an unvarying temperature. To keep the surface area of the marble the same, I will use a set weight and quantity of chips. ...read more.


I will also twist the plunger of the gas syringe slightly to verify that it can move with ease - as this could affect the final reading. So that I am as safe as is possible throughout the experiments, I will be wearing safety goggles whenever I am handling hydrochloric acid, or am around this acid, and I will also have my hair tied back, as the acid is an irritant. I am also only experimenting using a concentration of 2.5M, because above this it is too dangerous to conduct in the school. Analysis of Results Volume of Gas Produced in 60 Seconds (cm3) Concentration (M) 1st experiment 2nd experiment Average Rate (cm3/minute) 0.5 2 4 3 3 1.0 17 22 19.5 19.5 1.5 39 43 41 41 2.0 56 59 57.5 57.5 2.5 65 75 70 70 It can be seen that the results above show that as the concentration increases, the rate of reaction also increases. This is because in a more diluted acid, there are not as many acid particles. However in a more concentrated acid, there are more acid particles. ...read more.


Another problem I came across was that it was extremely difficult to measure out exactly 2 gram masses of the marble chips, and even when I did, the surface areas would not be the same - even though I used the same quantity of chips. This could be corrected by using marble cubes - which would all have the same surface area and mass, increasing accuracy greatly in this area. However, it is very expensive to use these, and we were unable to use them. These are the reasons for why I think my results were so unreliable, with suggestions to resolve them. I could also expand my investigation. I could use an extended range of concentrations with smaller intervals between them. For example 0.25M, 0.5M, 0.75M, 1.0M, 1.25M, 1.50M, 1.75M etc. up to 5.0M could be used. Although this would take an extremely long time, my results would be very precise, and would give a wider range of results. Generally speaking, I feel that the experiment has been quite successful, despite not being able to prove direct proportion. However more accurate methods of carrying out the stages have been found, meaning that if I were to repeat the experiment, I would be able to produce a much higher accuracy of data. Sally Andrews 11C Page 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. Marked by a teacher

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

    3 star(s)

    18 26 18-31 100 34 37 14 24 32 24-37 120 40 43 17 28 37 28-43 140 45 50 18 31 42 31-50 160 50 54 20 35 46 35-54 180 54 62 22 39 52 39-62 200 59 66 24 42 56 42-66 220 62 70 26 45

  2. How Concentration affects the rate of reaction.

    Why does the graph show this? We have to refer to the collision theory again. The rate of reaction is how quickly a reaction occurs and normally measures how quickly one of the reactants are used up. If the rate of reaction is faster, that means that the reactants are

  1. Investigate how concentration of hydrochloric acid (HCL) affects its reaction with calcium carbonate (CaCO3).

    30 seconds - 7cm3 CO2 gas produced 40 seconds - 10cm CO2 gas produced Concentration of acid - 2 molar 70 seconds - 85cm3 CO2 gas produced I recognised all of the anomalies for the 1 molar set of results by looking at my graph.

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

    If the solution is made more concentrated it means that there are more particles of reactant knocking about between the solution, which makes collisions between important molecules more likely. This means that there is a higher chance of collision because there are more acid particles.

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

    I don't want this factor to be introduced into my experiments. When the chalk gets in contact with the acid it starts reacting and I need to start the stopwatch as soon as the reaction starts. Therefore, I have to be very quick and precise.

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

    This is based on the collision theory that states that for a reaction to occur between two particles, an effective collision must take place to form product molecules. The reaction rate is the measure of how frequently effective collisions occur.

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

    This amount of energy is called the activation energy, or the Ea. There are two ways in which to increase the rate of reaction: giving the particles more energy, which gives more particles the activation energy, and also by increasing the frequency of collisions.

  2. Enzymes - show how substrate concentration affects the rate of reaction for an enzyme ...

    is: x y xy x� 0.20 0.0355 0.0071 0.04 0.80 0.0641 0.05128 0.64 1.00 0.0833 0.0833 1.00 1.20 0.111 0.1332 1.44 1.60 0.175 0.28 2.56 2.00 0.208 0.416 4.00 ?x = 6.8 ?y = 0.6769 ?xy = 0.97088 ?x� = 9.68 x = ?

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