• 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
5. 5
5
6. 6
6
7. 7
7
8. 8
8
9. 9
9
10. 10
10
11. 11
11
12. 12
12

# The effect of concentration on the rate of reaction of Magnesium with Sulphuric Acid.

Extracts from this document...

Introduction

The affect of concentration on the rate of reaction of Magnesium with Sulphuric Acid. Aim My aim is to determine how the concentration of sulphuric acid affects the rate of reaction between magnesium and sulphuric acid. I am going to do this experiment five times with five different concentrations: 0.2, 0.4, 0.6, 0.8, and 1mol. The concentration of the acid is recorded in moles per decimetre cubed (mol/dm�). I am going to repeat the experiment for each concentration three times to make my results more reliable. Introduction A rate is a measure of the change that happens in a single unit of time. A reaction is when particles called reactants collide and form new substances. Theses substances which are created are called products. The rate of a chemical reaction is how fast the reactants react against each other. Some reactions happen very fast, e.g. an explosion, while other reactions will be much slower, e.g. rusting. The reactant particles are only able to react when they successfully collide with each other. Not all collisions are successful because the particles don't have the correct activation energy. Activation energy is the minimum energy required before a reaction can occur. ...read more.

Middle

I will then plot five graphs, one for each concentration. I will plot average volume of H� against time. My graph will be plotted on something like this. I will calculate the gradient of each graph, which will give me the rate of reaction for that concentration. Gradient = y2-y1 x2-x1 Variables Independent - concentration of sulphuric acid (H+ ions) will increase by 0.2mols each time (0.2, 0.4, 0.6, 0.8, or 1mol/dm�) Dependant - the amount of hydrogen gas that is given off (cm�) Controlled - the starting temperature of sulphuric acid, catalyst, surface area of magnesium (5cm), volume of sulphuric acid (25cm�), the duration of the experiment (180seconds), the number of attempts per concentration (three) Accuracy and Reliability My results are recorded very accurately: * The stopwatch gave a reading +/- second * The gas syringe recorded to +/- cm� * The burette recorded to +/- 0.5cm� To increase the reliability of my results I repeated the experiment for each concentration three times and I also found the average volume of gas produced for each concentration. Safety * Make sure that all work surfaces are clear before I begin the experiment * Wear safety glasses to prevent any acid entering my eyes * Take care in using the glassware, as it can be sharp when broken If I follow these points it will help keep the experiment safe. ...read more.

Conclusion

I was able to repeat each concentration, to make my results more accurate. In general I had no real anomalous results, as I carried out each experiment three times and worked out the average for each one. I worked with a partner to do this experiment and I think this is why my results are so accurate, as one of us watched the stopwatch (time), while the other recorded the amount of hydrogen gas produced. A gas syringe was used to measure the volume accurately to 0.1 cm� and the magnesium strips were also measured accurately. I used a measuring cylinder to measure the amount of acid accurately to 0.1 cm� and the stopwatch also measured the time accurately to 0.01seconds. I think this made the results I obtained reliable. I think if I was to make my results even more accurate I could increase the duration of the experiment to four or five minutes instead of just three. I could also try and use a gas syringe with a larger scale. Instead of a scale of just 100cm� I could have a scale of about 150cm�. I could also repeat the experiment more times. I would also use a wider range of concentrations. This could make my results more reliable. I am very pleased with my experiment and my results reflected my prediction. ...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

## Here's what a teacher thought of this essay

3 star(s)

Good report, some solid scientific theory supported by valid data. The data could be adjusted to cover a more appropriate range. The evaluation should also be extended. Generally a good effort, though more scientific theory and vocabulary could be used to support the prediction. Improvements to the investigation write up have been suggested throughout.

Marked by teacher Cornelia Bruce 17/04/2013

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. ## How does changing the concentration of the Hydrochloric acid affect it reactions with Magnesium?

Also (and more importantly), the collisions are more energetic. If the stirring factor is not carefully controlled it could lead to inaccurate results if the concentration of the acid solution is not what we calculated it to be. The surface area made no apparent difference, although it is hard to tell with the small amount of data that we collected for surface area.

2. ## A-Level Investigation - Rates of Reaction &amp;amp;#150; The Iodine Clock

Table 1.2 Reagent Concentration Volume (ml) Na2S2O3 0.025M 10 KI 1M 8 H2SO4 1M 5 When varying volume H2SO4: (H2SO4 volumes 10, 12, 14, 16, 18, 20ml - 0.1M) Table 1.3 Reagent Concentration Volume (ml) Na2S2O3 0.25M 8 H2O2 20 Volume 10 KI 1M 10 Each solution that is made

1. ## The Iodide - Persulphate Reaction: Determining the Effect of Concentration on Reaction Rate

linear relationship between [S2O8-2] and the rate of the reaction and the rate constant. The purpose of this experiment was to perform many trials of the same experiment, varying only the concentrations of certain ionic compounds in order to determine the affect of concentration on the rate of a reaction.

2. ## Influence of pH on the Activity of Potato Catalase.

The main error in this experiment was the factor of human error; this was mainly present in the measuring and timing stages of the experiment. The measurement of the buffer solutions, hydrogen peroxide and cutting of potato discs will have had slight discrepancies in their quantities; this will have had

1. ## To investigate the effect of ph on the activity of trypsin.

The juice that the pancreas secretes is alkaline so the ph that works best should also be alkaline. The temperature won't affect the reaction as I am going to keep it as the same temperature throughout the experiment. This is what I think will happen as the ph increases the

2. ## The effect of aspirin on the action of bovine liver catalase

Reye's syndrome causes an abnormal build up of fat around all organs particularly the liver, and causes a severe increase of pressure on the brain. If not treated the patient will often die within a few days. Catalase is an important enzyme involved in many chemical reactions within the body.

1. ## Iodine Clock Reaction

The regression value is also closest to 1 when a straight line of best fit is made. Since rav 1/?t Therefore, if the rate of reaction in which iodate ions is consumed is r av [IO3-] 1, then 1/?t [IO3-] 1 As concentration of Iodate ions increase by a certain factor, so does the rate of reaction.

2. ## To determine the rate law for a chemical reaction among hydrogen peroxide, iodide and ...

Then the sodium thiosulphate solution was added drop by drop until the reaction mixture in conical flask just changes from dark blue to colorless. Part II) Reaction Rate Measurements Six reaction mixtures will provide the information necessary to determine the effects of the concentrations of H2O2, I- and H+ on

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