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

The effects of concentration have an effect on the rate of reaction.

Extracts from this document...

Introduction

INVESTIGATING THE EFFECTS OF CONCENTRATION AIM: To find out how the effects of concentration have an effect on the rate of reaction. PREDICTION: I predict that the more Sodium Thiosulphate there is, the faster the reaction will take place with the Dilute Water and the Hydrochloric Acid, there are more Sodium Thiosulphate molecules and less dilute water molecules for them to collide into. However, if there are more Dilute water molecules, the rate of reaction will be slower, because the more dilute it is, the less concentrated the solution is. The decrease of concentration will take longer for the rate of reaction because there are fewer molecules for the Sodium Thiosulphate to collide into. APPARATUS: Dilute Water 0.15M Sodium Thiosulphate 2M Hydrochloric Acid 10 cm3 Measuring Cylinder 50 cm3 Measuring Cylinder Stop clock Glass Beaker Safety Goggles METHOD: Measure 50cm3 of Sodium Thiosulphate. Pour this into the conical flask. Then, measure 10 cm3 of Distilled Water and add to conical flask. Finally, measure 10 cm3 of Hydrochloric Acid and add to the conical flask. ...read more.

Middle

I also predicted that for the reaction to take longer you would use more dilute water molecules, as this will slow the reaction down because there aren't many Sodium Thiosulphate molecules for the dilute water molecules to smash into together with and to break the Sodium Thiosulphate bonds. From the 1st graph, I've noticed that on the line representing the average tells us that on the first and second point it is nearer to test 2s result. As all three lines start rising, we can know see that the third average point is above both of the lines representing the two tests. On the fourth and fifth point on the average line, it decreases below test 1 and the line representing line 1 increases rapidly. On the second graph, the points representing test 3, test 4 and the average are quite close together for the 0-50, 10-40, 20-30 concentration. As the points reach the 30-20 concentrations on the graph the points start to spread out and at 40-10 the points are spread out even more. ...read more.

Conclusion

This would tell us if we had more Hydrochloric Acid than Dilute Water, would it take quicker or longer for the Dilute Water to break the bonds. If I did this experiment, I think that, the more Hydrochloric Acid there is with less Dilute Water; the reaction will take place faster because the Hydrochloric Acid will be stronger and it will take longer for the Dilute Water to break the Hydrochloric Acid bonds. After this I would do the experiment again to but change the Dilute Water to Warm Dilute Water to see whether the changes have a big difference or a small difference to the outcome of the experiment. This would show whether Hydrochloric Acid has an effect on the rate of concentration. To improve the experiment I would make sure that the solutions were measured out accurately and I would also make sure that we clean the conical flask thoroughly after each test, so no contents from the last test remains in the next test, this is so that the test can be fair. Furthermore, I would set out the equipment appropriately, so that it is easier to know where all the chemicals and apparatus's are. Sonya Patel 28/03/03 102 10E 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 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. Investigating the effects of changing the concentration of different solutions on the refractive index ...

    Record the distance, r2, travelled by the microscope from where it starts to where it stops this time. Finally remove the solution, just simply place the coin into the watch glass and find out the distance, r3, travelled by the microscope.

  2. Rate of Reaction between Sodium Thiosulphate and Dilute Hydrochloric acid

    out the balanced equation so I knew what the reaction would give me at the end and I used my text book: Chemistry for AQA(Heinemann) by Ann and Patrick Fullick to help me back my prediction with solid scientific knowledge.

  1. The Effect Of Concentration Of The Reaction Between Sodium Thiosulphate And Hydrochloric Acid

    We must also make sure that we add both the water and the hydrochloric acid at exactly the same time (into the conical flask with the sodium thiosulphate in it), or it could affect the results of the experiment. We must start the stop watch at the exact time as

  2. What effects the rate of a reaction

    I will also complete the experiment in a strict hour period. This should emphasise the effect of temperature surroundings to a minimum. Within the time of an hour the change in temperature should only occur to a minimal level or hopefully shouldn't change at all.

  1. The effects of concentration on reaction rate with sodium thiosulphate

    The fourth factor is to add a catalyst, but in this experiment we did not add a catalyst. Knowing the collision theory, it makes my predictions clearer with what is going to happen when the experiment will take place. So, if I have a large volume of sodium thiosulphate and

  2. I am investigating how the effect of concentration has on the rate of reaction ...

    The results showed that at a higher concentration the rate of reaction between hydrochloric acid and magnesium was higher. The reaction that will be investigated is between hydrochloric acid and sodium thiosulphate. The reaction as shown in the equation below: Preliminary Results A preliminary experiment was done to find out

  1. Investigating On How Concentration Effects The Rate of Reaction

    We poured 100ml of Hydrochloric acid with the concentration of 2.5 in a conical flask and took a Magnesium strip and dropped it into the Acid we quickly put the syringe on the top of the flask and we left it for two minutes and measured the amount of gas

  2. The Effect of Concentration on the Rate of Reaction.

    Prediction I predict that when the concentration of the hydrochloric acid is lowered, less carbon dioxide gas will be evolved. Therefore the rate of reaction should be slower because the carbon dioxide gas will take longer to be evolved, as there is a greater volume of water in the solution when the concentration decreases.

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