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

Investigatin the Rate of Reaction

Extracts from this document...

Introduction

Investigating the Rate of Reaction Aim To investigate the effect of concentration on the rate of reaction between sodium thiosulphate and hydrochloric acid. Prediction I predict that as the concentration of the sodium thiosulphate is increased, the rate of reaction will increase. This is because there are more particles, therefore more chances of collisions. The graph that is going to be drawn in my analysis will have a positive correlation. Also it might be curved as the increase in rate of reaction which will not be exactly the same as the concentration of the sodium thiosulphate. This probably will be because there are more chances of collisions. So when the concentration will increase then the particles would have more energy and therefore it will move faster. This is the reason why they will collide more often. ...read more.

Middle

-same amount of sodium thiosulphate -same amount of hydrochloric acid -same surface area Chemical Equation Word: Hydrochloric acid + sodium� sodium + sulphur dioxide + water + sulphur Symbol: 2HCL + Na2S2O3 � 2NaCL + SO2 + H2O + S Dilutions Table: Sodium thiosulphate (cm3) Water (cm3) Concentration (mol dm -3) 50 0 1.0 40 10 0.8 30 20 0.6 20 30 0.4 10 40 0.2 Analysis My results tell me that as I used more sodium thiosulphate the concentration increased and the time taken for cross to disappear decreased. The solution with the greatest concentration was 1.0 mol dm -3 because if I look at the graph or results table then I can see that the fastest time was in concentration 1.0 mol dm -3. The disappearance of the cross was quickest when it was 1.0 mol dm -3 because there was more substance. ...read more.

Conclusion

I got accurate results by using accurate equipment, used burette to measure liquids. To improve the accuracy of the experiment I could've used a colorimeter, which is a meter that measures how much light it can absorb. I did not get an outlier. This is because of spillages, wrong timing or wrong results. My equipment had various levels of precision. The tolerances of each piece of equipment are: -Burette - 0.1cm3 -Measuring cylinders - 0.1cm3 -Pipette - exact to 25cm3 They helped me to measure substances accurately. I could improve my experiment by using a colorimeter, making more repeats of the experiment and look at different concentrations. Concentration of sodium thiosulphate (mol dm -3) 1 2 3 4 5 Average (seconds) 1.0 49 30 24 61 32 39.2 0.8 67 55 57 53 53 57 0.6 95 81 82 82 63 80.6 0.4 179 113 135 137 179 148.6 0.2 276 289 253 274 274 273.2 ...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 Classifying Materials 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 Classifying Materials essays

  1. Marked by a teacher

    rates of reaction- hydrochloric acid

    3 star(s)

    This helped me to work out the optimum length of ribbon and the volume of hydrochloric acid I should use. From my results, I decided to use 3cm strips of magnesium and 15ml of hydrochloric acid. I did use a measuring cylinder 50ml to measure the amount of hydrogen bubbles

  2. The rates of reaction between CaCO3 and HCL

    From both samples east and west the curve of best fit is this shape which shows that reaction followed the norm but for each there are two anomalous results. For East * (120 , 0.30) * (165 , 0.32) For West * (135 , 0.36)

  1. Rate of reaction of hydrochloric acid on magnesium.

    be too slow this would save a lot of time because if I use 0.1M the reaction would be very slow. So using 0.3M as the weakest concentration would be appropriate because it would show the reaction at a decent time scale.

  2. Affect of concentration on reaction

    * Timer * 2 Molar Hydrochloric Acid * Calcium Carbonate (chips) Diagram Method 1. Measure 50cm3 of 2 molar HCl into a beaker. 2. Place beaker on scales then press 'tare' so reading returns to 0. 3. Take a few chips of CaCO3 with an approximate mass of 5g. 4.

  1. Our experiment consisted of two samples of water containing unknown substances, and our objective ...

    create a slight imbalance which could cause the whole thing to topple over when it's accidently nudged by someone. Remember to fasten the bosshead and clamp quite tightly because if it unfastens it will just unnecessarily waste time and resources.

  2. Rate of reaction of different concentrations of sodium thiosulphate.

    + 2HCL (aq) S(s) + SO2 (g) + 2NaCl (aq) + H2O(1) The variables and fair testing These are the variables that will influence the rate of the reaction, such as the following; * Temperature of the surrounding, * Concentration of the sodium thiosulphate, * Volume of sodium thiosulphate, *

  1. An experiment to investigate the factors that determine the amount of energy released when ...

    This was very important since the distance determines the amount of heat that reaches the water. If the distance is too large, then not enough heat will reach the water and a lot of the heat will be lost around the sides.

  2. How Does Temperature Affect the Rate of Reaction Between Hydrochloric Acid and Sodium Thiosulphate

    Because test 4 gave the slowest reaction, I decided to use this combination - 35cm3 of hydrochloric acid and 25cm3 sodium thiosulphate. This is because if a reaction takes longer, it leaves more time to think and press the timer at just the right time.

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