• 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. In this investigation I am trying to find out how the concentration of sodium ...

    will show how the concentration of sodium thiosulphate affects the rate of reaction. I predict that 'as the concentration of sodium thiosulphate increases, the time taken for the cross to disappear will decrease. The higher the concentration of sodium thiosulphate, the faster the reaction will take place.'

  2. The Iodine Clock Investigation

    J mol-1 = 6.51 kJ mol-1 It can therefore be shown quantitatively by just three values from a single graph the possible errors that might exist in the results gained. Maximum EA(kJ mol-1) Average EA(kJ mol-1) Minimum EA(kJ mol-1) Largest Possible Error 131.90 56.63 6.51 125.39 Q 10 Rule The

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

    each time the speed at which the acid particles collide with the magnesium ribbon will increase more the higher the temperature goes. This means the acid particles move with more energy, which means they will collide with the magnesium with more energy, which will give more successful collisions per second.

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

    * All the apparatus used - the conical flask, the piece of paper with a cross on it, the measuring cylinders and the stop clock will be the same for each experiment. * I will use the same eye, as some people have different eyesight in each eye, and I know for a fact that I do.

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

    I used a heatproof mat and tripod when using the Bunsen burner and took extreme caution when turning it on and off. I took the same extreme caution when I repeated the results, which I will talk about later on.

  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. Find the effect of changing the concentration and the rate of reaction between Sodium ...

    This is called the collision theory. If particles do not have enough energy, they will harmlessly bounce off one another. If the particles meet, they may rebound without a reaction. But if they collide with enough force, a chemical reaction will occur. The diagram below shows that the top diagram has got enough energy to react and form a reaction.

  2. To investigate the effect of changing the concentration on the rate of reaction between ...

    Large particles have a small Small particles have a large surface Surface area in relation to their area in relation to their volume volume less particles are exposed more particles are exposed and and available for collisions. This available for collisions.

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