• 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
3. 3
3
4. 4
4

# To Determine the Activation Energy of the Reaction between Bromide ion and Bromate (V) ion in Acid Solution

Extracts from this document...

Introduction

Name: Chan Lo Ho Class: 6A Class no.: 4 Date: KI4 To Determine the Activation Energy of the Reaction between Bromide ion and Bromate (V) ion in Acid Solution Objectives: By reacting Potassium Bromide and Potassium Bromate in the acid solution in varies temperature, we can then determine the Activation Energy of the reaction in different temperature through the equation:. Results: Experiment Temperature Time t/s ln 1/t Temperature K 1/K 80 ?0 N/A 353 2.83286119*10-3 50 21 -3.044522438 324 3.086419753*10-3 45 27 -3.295836866 316 3.164556962*10-3 40 42 -3.737669618 315 3.174603175*10-3 35 70 -4.248495242 311 3.215434084*10-3 30 113 -4.727387819 304 3.289473684*10-3 Questions: 1. ...read more.

Middle

3. Based on your results, is it advisable to perform the experiment at high temperatures such as 80?? From the above results, the time of the reaction is shorter as the experiment temperature increase. So it is not advisable to perform the experiment at high temperatures as the time of reaction is too short, it is not easy for us to record. 4. Why is it not necessary to know how far the reaction has proceeded at the point where the methyl red is decolourized? In the experiment, the number of mole and the molarity of each chemicals used are the same. ...read more.

Conclusion

Also the rate constant k is proportional to the rate of the reaction when the temperature changes. Therefore, can substitute k. (b) Derive an equation relating ln k and 1/T. ln k = ln A - Ea/RT ln k = ln A - (Ea/R)(1/T) (c) Determine Ea by plotting a suitable graph. (Given R=8.3JK-1 mol-1 ) Slope=[-4.727387819-(-3.044522438)]/(3.289473684*10-3-3.086419753*10-3) =-8287.78 ? lnk = lnA - Ea/RT The slope=-Ea/R ?-8287.78=-Ea/R Ea=8287.78*8.314 =68904.6 J mol-1 =68.9046 kJ mol-1 6. Explain why the reaction rate can be affected by temperature. As the temperature increase, the numbers of vibration increase, the speed of the particles increase, then the frequency of collision increases. As the result, the frequency of effective collision also increases. Therefore the reaction rate will increase vice versa. ...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. ## Investigation to determine whether agitation has an effect on the activation energy of a ...

I will then take the temperature of the mixture. I am going to repeat each experiment three times to make sure the values are roughly similar, any anomalous results will be repeated. Here is a diagram of my equipment: bung gas syringe acid magnesium magnet stirrer Prediction: I predict that the activation energy for the reaction will not be lowered by the stirring, but reached more quickly.

2. ## Give an account of the properties and uses of phenol

An antioxidant added to the food can hinder oxidation. BHA (butylated hydroxyanisole) and BHT (butylated hydroxytoluene) are common antioxidants used in food to retard this development of oxidative rancidity in unsaturated fats and oils. These phenols appear to work by donating the H-atom of the -OH group to the free hydroperoxide radical (ROO.)

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