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

Investigate the rate of reaction between HCl and Na2S 2O3

Extracts from this document...

Introduction

Planning Investigate the rate of reaction between HCl and Na2S2O3 Jackie Randall 10A For this piece of coursework we are investigating the rates of reaction and he effect different changes have on them. The rate of reaction is the rate of loss of a reactant or the rate of formation of a product during a chemical reaction. We are studying the affect of changing concentration of Na2S2O3 Solution and dilute HCl. I believe these variables will affect the rate of reaction: * Surface area * Pressure * Temperature * Catalyst * Concentration Concentration If the concentration of a solution is increased there are more reactant particles per unit volume. This increased the probability of reactant particles colliding with each other. Pressure If the pressure is increased the particles in the gas are pushed closer. This increases the concentration and that will change the rate of reaction. Surface Area If a solid is powdered then there is a greater surface area available for a reaction, compared to the same mass of unpowdered solid. ...read more.

Middle

I also predict that as the concentration of the sodium thiosulphate increases the rate of reaction will increase. When the temperature is increased the particles will have more energy and this would enable them to move faster. This will make them collide more often and with more energy. Particles with more energy are more likely to overcome the activation energy barrier to reaction; this would make them react successfully. If solutions of reacting particles are made more concentrated there are more particles in the area. Method Experiment 1 - Changing the concentration 5 cm3 of HCl (at concentration 1 mol./dm3) and 15 cm3 of sodium thiosulphate (at varying concentrations - 10 to 35 g/dm3) are poured out into two measuring cylinders and then poured into a conical flask, which is placed on top of a board marked with letter X. The stopwatch will now be started. When the mixture has turned sufficiently cloudy so that the letter X can no longer be seen the stopwatch will be stopped and the time will be recorded. ...read more.

Conclusion

As the solution gets more concentrated the ions are closer together therefore they will collide more often and more successful collisions are likely, therefore as the concentration decreases fewer successful collisions take place and the rate of reaction slows. Apparatus List * Water Bath * Hazcards * Plastic Pipette * Beaker (250cm3) * Wash bottle * Distilled water * Measuring cylinder (100cm3 and 10cm3) * Flask (250cm3) * HCl (1 Molar) * Stopwatch * Na2S2O3 What I Will Do With My Results... With the results I will use them for creating the following items: * Plot some graphs (Perfect curve, line of best fit) On the axes, I will write: The rate (y axes) and Average time (x axes). * I will also plot the following graph: average times (y axes) and concentration of a) Na2S2O3 b) HCl Strange Results... Potential Variables...Anomalies These are results that are completely out of the blue and therefore most likely to be wrong! I will keep a close eye out for these in my experiments and if I do spot any the experiment will be repeated. ...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. Reaction between sodium thiosulphate solution (Na2S2O3) and dilute hydrochloric acid (HCl)

    I will then use my results to calculate the rate of reaction = 1 (1/secs or S-1). time To ensure that my results are reliable I will repeat each experiment twice. To guarantee they are accurate I will calculate everything to the same number of decimal places and repeat any strange results that I may find.

  2. Investigating the effect of temperature on the reaction between Sodium Thiosulphate (Na2S2O3) and Hydrochloric ...

    From the straight line I can calculate an equation: y = 0.0008 x - 0.014. From 20�C a rise of 10�C approximately doubled the rate of reaction. From 40�C, however, a rise of 22�C is needed before the rate of reaction is doubled. This shows an increasing rate of reaction.

  1. ICT modelling spreadsheet - This coursework was designed to investigate the uses of electricity ...

    I predicted that I would save around �15. The appliances in the kitchen include the microwave, iron, tumble dryer, washing machine, freezer, refridgerator and the kettle. Despite this, the cost of running the appliances in the kitchen is more expensive than I thought, and when I ran this data through the spreadsheets, by setting the amount of times

  2. The Rates of Reaction Between HCl and Na2S2O3.

    To work out the rate of reaction, I will inverse (1/time taken) the time it takes for the reaction to finish then I will multiply the time by 1000. This will give me my rate of reaction. I will then repeat the experiment increasing the concentration of the HCl by 1cm� and decreasing the H2O concentration by 1cm�.

  1. Safety To investigate the effect of concentration on the rate of reaction between sodium ...

    * Temperature and surface area should also be kept constant. If there is a higher temperature, then the time taken for the reaction to complete will be affected. * The concentration of the Hydrochloric Acid should be kept constant. If the concentration is higher, then the speed of the reaction will increase.

  2. Investigate how temperature affects the rate of reaction of sodium thiosulphate (Na2S2O3) and hydrochloric ...

    When two reactant substances are mixed (acid, alkali or acid, base etc.), if the molecules collide in a certain way and with enough force the reaction will occur. This is the collision theory. The amount of energy needed to give the atoms or molecules the strength to collide so that they react is called the activation energy.

  1. How much concentration of sodium thiosulphate (Na2S2O3) affects the rate of reaction when tested ...

    An iron catalyst speeds up the reaction and makes the process fast enough to be economically worthwhile. If reacting substances are heated, the rate of the reaction usually rises; equally, if they are cooled, the reaction slows down. In order to react, the particles in the substances must collide with each other.

  2. An investigation into a factor affecting the rate of reaction of sodium thiosulphate (Na2S2O3) ...

    This makes it easier to refer to as this is how I recorded my results. Prediction: I believe that as the concentration of sodium thiosulphate increases, so the rate of reaction will increase, thereby showing a positive correlation. This prediction is partly based on my preliminary findings and partly on common sense.

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