• 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

# How does concentration affect reaction rate?

Extracts from this document...

Introduction

How does concentration affect reaction rate? Introduction I will be carrying out an investigation into how concentration affects reaction rate. I will be looking at sodium thiosulphate and hydrochloric acid. The reaction is represented by the following equation: Na2S2O3(aq) + 2HCl(aq) 2NaCl(aq) + H2O(l) + SO2 (g) + S (s) I will add the hydrochloric acid to the Sodium Thiosulphate and time how log it takes for the mixture to turn opaque. I will use a different concentration of Sodium Thiosulphate each time. Prediction My predictions, using previous knowledge is that the higher the concentration of Sodium Thiosulphate there is the faster the reaction rate will be. ...read more.

Middle

1) The number of collision per unit time between the reacting species. 2) The fraction of these collisions that are successful in producing a mew molecule. If two or more molecules collide but are not orientated correctly then no reaction will take place. For a reaction to occur, molecules must collide not only with sufficient energy but with the proper orientation. This diagram is the reaction between ethane, CH2CH2, and hydrogen chloride, HCl. In dilute Sodium Thiosulphate there are not so many particles. This means that the chance of the particles colliding, and colliding correctly is much less than if the Sodium Thiosulphate was concentrated. ...read more.

Conclusion

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. The experiment is repeated with the concentrations of Sodium Thiosulphate and distilled water are changed. The whole procedure is then repeated. The experiment is repeated until a wide range of results are obtained. A graph can then be drawn representing the results. Fair Test In order for my findings to be valid the experiment must be a fair one. I will use the same standard each time for judging when the X has disappeared. I will make sure that the measuring cylinders for the HCl and sodium thiosulphate will not be mixed up. The amount of HCl will be 5 cm3 each time. ...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

# Related GCSE Patterns of Behaviour essays

1. ## Find out how the rate of hydrolysis of an organic halogen compound depends on ...

NOTE: Never give an unconscious person anything to drink. After handling, wash before eating, drinking or smoking. If the substance is spilt, the area of spill should be evacuated and personnel kept upwind. All sources of ignition should be shut off. The method for cleaning up the spill includes absorbing the substance on sand or vermiculite and it should be placed in a closed container for disposal.

2. ## How Does The Concentration Of Sodium Thiosulfate Affect The Rate Of This Reaction?

I will do this by collecting all measurements on the same day and doing all tests at room temperature. If the measurements were taken on a different day, the temperature might vary. Measuring Apparatus I will keep the same type of measuring cylinder, because if I decide to use a

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