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

Plan to investigate the factors that affect the rate of reaction between sodium thiosulfate and hydrochloric acid

Extracts from this document...


Factors that affect the rate of reaction between sodium thiosulfate and hydrochloric acid Aim: To investigate the factors that affects the rate of reaction between sodium thiosulfate and hydrochloric acid. When sodium thiosulfate reacts with hydrochloric acid, sulphur is produced. The sulphur is produced in very small particles and causes the solution to cloud over and turn a yellow. There are several different factors that affect the rate of a chemical reaction. In general, a factor that increases the number of collision between particles will increase the reaction rate whereas a factor that decreases the number of collisions between particles will decrease the reaction rate. The factors are listed below: Changing the temperature of the reactants ? This would affect the results of the experiment because as the temperature of a solution increases, the particles gain more energy, due to the heat. Energized particles move faster and this increases the chance of the particles colliding with each other and increases the force that the particles hit each other with. ...read more.


This increases the rate of reaction as there are more successful collisions per second while decreasing the surface area would decrease the rate of reaction. Introducing a catalyst to the solution could affect the results of the experiment because a catalyst is a substance that changes the rate of a reaction and doesn?t get changed up or used in the process. I have chosen to change the concentration of sodium thiosulfate because I am unable to change the surface area of the reactants, as there is no solid in the reactants. A catalyst would be difficult to find and changing the temperature would be difficult to change, as we would need to use a water bath and it would mean we o he experiment on one day. So I have decided to change the concentration of the sodium thiosulfate. Hypothesis ? I will measure the how long it takes for the sulphur to form, or in other words, how long until we cannot see the cross. ...read more.


* Digital Stop clock ? Used to time how long it took for the solution to turn cloudy and it?s a more precise reading than an analogue clock as they are nearest to hundred to the second. * Paper marked with ?X? ? Used to see whether the solution is cloudy enough to make the ?X? not visible. Method ? * Draw an ?X? on a piece of paper and place under a conical flask ? We will be measuring how long it takes for the cross to disappear, so it should be clear, bold, and easily seen before the experiment starts. * Add 5ml of hydrochloric acid in the measuring cylinder using a pipette and add the solution into the conical flask * Add 25ml of sodium thiosulfate into the conical flask and immediately start the stop clock. * Swirl the conical flask around, observing carefully * When you can no longer see the cross, stop the stop clock and record the time * Repeat this with the other concentrations of sodium thiosulfate. ...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 Aqueous Chemistry 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 Aqueous Chemistry essays

  1. To investigate the factors affecting neutralisation.

    My hypothesis that the energy changes would be the same is therefore incorrect. My second hypothesis was that the strength of the acid would have no effect on the energy change. This is because I am not changing the molarity of the acid and so there are no extra molecules

  2. To investigate three factors that affect the rate of cooling a liquid and to ...

    I shall continue recording the results until the time reaches 12 minutes. Fair Test Experiment 1 - In the first experiment I shall use the same water source for all the beakers and have the water at the same temperature when I start the stop clock.

  1. Rates of Reaction

    where there is already a little amount of pressure and could therefore extend the result measurements further then they actually should be. However the steepest point on my graph actually derives from the 2.0M line not the 2.5 this being 90cm�/110s though this is probably due to the fact that

  2. The action of amylase and pectinase in varying amounts when clarifying cloudy apple juice.

    If I had used some different enzymes, such as protease then I might have found that the clarification process was much quicker and there was a visible result. I do not know what the reason for the anomalous results in experiment 3 could be.

  1. to investigate how the concentration affects the rate of the reaction

    a beaker to pour acid in to the measuring cylinder 8. a stopwatch to time the experiment 9. a scale that can measure up to two decimal places to measure the magnesium I use for the experiment I have chosen the following equipment because the measurements and readings gotten from

  2. What effects the rate of a reaction

    So simply I predict that as the concentration of the solution increases, the faster(shorter) the rate of reaction will be. So as the molarity of the concentrations increases the shorter the length will be for the magnesium to dissolve. I believe this because increasing the concentration of the reactants increases

  1. Investigate the effect that concentration has on a reaction on these factors: Temperature rise, ...

    Hence, Heat evolved = mc ' ' = 38 x 4.2 x = 'X' Joules To find out the value of the heat evolved, it is essential to know the number of moles present in each concentration being used, so the formula is used: NaOH (0.8M)

  2. What factors affect the rate pf reaction between sodium thiosulphate and hydrochloric acid?

    I will repeat these procedures for all my experiments but change the concentration of sodium thiosulphate diluted with water for each experiment. Safety precautions - When I am conducting my experiment I will wear safety goggles in case I get hydrochloric acid or dangerous solutions in my eye -

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