• 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

Investigation to find out how the rate of reaction between Sodium Thiosulphate and hydrochloric acid that is affected by changing the concentration.

Extracts from this document...

Introduction

Magnesium + Hydrochloric Acid Investigation PLANNING Introduction Investigation to find out how the rate of reaction between Sodium Thiosulphate and hydrochloric acid that is affected by changing the concentration. Preliminary Experiment Aim To investigate the rate of reaction between: Sodium Thiosulphate and Hydrochloric Acid by changing the concentration. Apparatus * Beakers - to pour each substance into * Measuring cylinders - to measure the amount of each substance * Stop clock - to time the reaction * Conical Flask - to pour in all the substances and mix together * Paper with a red cross - to watch as reaction takes place * Hydrochloric acid - for the reaction to occur * Water - for the reaction to occur * Sodium Thiosulphate - for the reaction to occur * Pipette - to take a small amount of solution Hypothesis (Prediction) I predict that as the concentration of the sodium thiosulphate increases the rate of reaction will decrease. This is because if the concentration of a solution is increased there are more reactant particles per unit volume. This increases the probability of reactant particles colliding with each other. ...read more.

Middle

The concentration of the acid affects the rate of reaction because, the higher the concentration of the acid (let's say 2 molars) will cause the reaction to happen quicker compared to a less concentrated acid (let's say 1 molar). If the solution is made more concentrated it means there are more reactants colliding between the water molecules, which make the collision between the important particles more likely. In a gas, the pressure simply squashes the molecules together so there are more collisions. On the diagram below, on the left hand side there are less concentration, less particles and slower reaction. However on the right hand side diagram there is more concentration, more particles and quicker reaction occur. For a reaction to occur particles have to collide with each other. Only a small percent result in a reaction. This is due to the energy barrier to overcome. Only particles with enough energy to overcome the barrier will react after colliding. The minimum energy that a particle must have to overcome the barrier is called the activation energy, or Ea. An increase in the frequency of collisions can be achieved by increasing the concentration, pressure, or surface area. ...read more.

Conclusion

Then place a piece of plastic on top of the measuring cylinder, preventing water to spill out. Place a boiling tube on a test -tube rank. The boiling tube must have the magnesium ribbon placed inside it. Then we will pour the Hydrochloric Acid into the test-tube. When pouring the hydrochloric acid into the test tube I will make sure that I wear safety goggles. Start the stopwatch, and take the measurements of the reaction time, until it finally finishes. Then record the results into a table and then find out how to work out the average. I will repeat each experiment to make it a fair test. Results Below is a table in which I will place all of my gathered results at the end of the experiment. Experiment No. Volume of Thiosulphate/cm� Temperature (�C) Volume of Hydrochloric Acid/ cm� Time Taken for Cross to Disappear/s 1 25 60 5 2 25 50 5 3 25 40 5 4 25 30 5 5 25 20 5 I will then be able to analyse the results and see whether my hypothesis was correct or not. If it isn't then I shall investigate further to see where I could have possibly gone wrong. ?? ?? ?? ?? Hemali Amin Chemistry Coursework S4G Pg.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. The Iodine Clock Investigation

    Order Of The Reaction And The Rate Equation As already stated in the background information gained at the start of this investigation, it is possible to determine the order of the reaction with respect to each of the reactants, and also the reaction as a whole.

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

    Hydrochloric Acid � Mass of the magnesium ribbon used � Concentration of the Hydrochloric acid � Surface area of the magnesium ribbon used All of these factors will change the rate of reaction because of the Collision Theory. This is a theory that is used to predict the rate of a reaction.

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

    There are many factors that can affect the rate of reaction. I will explain most of these factors and see how they are relevant to my investigation and if these factors will affect the specific reaction of chalk and hydrochloric acid.

  2. Rate of reaction of hydrochloric acid and mangesium ribbon.

    I will then time for 2 minutes and take a reading of the gas every twenty seconds. I will use six concentrations for this experiment and they will be:- 25ml acid : 0ml water 20ml acid : 5ml water 15ml acid : 10ml water 10ml acid : 15ml water 5ml

  1. An investigation into the effect of changing the concentration of the sodium thiosulphate solution ...

    I will also be using a conical flask in the experiment, because it's shape is such that it will not spit should any violent reactions occur. I will be performing the experiment in a well-ventilated lab so the sulphur dioxide fumes are not inhaled by anyone.

  2. How does changing the concentration of hydrochloric acid affect its rate of reaction with ...

    In this preliminary experiment, the independent variable was the concentration of hydrochloric acid and the dependant variable was the temperature. The controlled factors were the surface area of the magnesium, and the temperature, which was kept constant at room temperature.

  1. An Experiment to Investigate the Effect of Changing the Concentration of Hydrochloric Acid on ...

    As in my aim: I had already decided that I wanted to obtain the minimum of five readings so I could draw up at least some conclusions. Otherwise the investigation would be pointless because my analysis and evaluation would be based on my own assumptions.

  2. Investigating the effect of changing temperature on the rate of reaction between Sodium Thiosulphate ...

    I used the Bunsen burner at each temperature with the heatproof mat on it and the wire gauze. I repeated each temperature a total of 2 times to make my results accurate and calculated an average by which I compared each temperature with greater ease.

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