• 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

# Investigating how varying the concentration of hydrochloric acid affects the rate its reaction in a given time.

Extracts from this document...

Introduction

Investigating how varying the concentration of hydrochloric acid affects the rate its reaction in a given time. Prediction: The collision theory worked on the idea that particles "crash" into the substance that they come in contact with therefore causing a reaction. The surface area has a big affect on this. Whatever I choose to be the size of my chips the particles will only collide with what is on the outside of the marble chips. If I choose big marble chips then there would still be lots of marble not exposed to the acid particles therefore not being able to react. Choosing small marble chips will give me a faster reading because there will be more marble to react. When you increase the concentration of a substance in a certain space, the number of particles in that substance increases. So by adding acid of a higher concentration, you are effectively cramming more particles of hydrochloric acid into the same space. This will mean that there is more particles to react with the marble than before. Going on this theory, I predict that, by adding acids of a higher concentration, I will see a faster rate of reaction. ...read more.

Middle

The weakest acid, which is 1 molar will be made by just adding 10 cm3 of 1 molar acid to a small measuring cylinder, will then be added to the chips and the bung will be placed in the top of the conical flask. As the acid is being added the stopwatch will be started and for 2 minutes, at 10-second intervals a line will be added, with the glass marker pen, on the measuring cylinder to show where the water was at that point. This will then be repeated again to make sure have reasonable results. If the results are totally different to the first set then the experiment will be repeated a third time to make sure that the results are reliable. The water will be filled up again, the marble chips restocked and the experiment will be repeated but with higher concentration of acid. These higher concentrations are: 1.45, 1.6, 1.75, 1.9. These concentrations will be carried out until the experiment is finished. Safety wise I am aware that I must wear safety goggles at all times, from as soon as i start the experiment to as soon as I finish. ...read more.

Conclusion

Results: 10 20 30 40 50 60 70 80 90 100 110 120 Using 0.5 molar 5 7 11 15 20 24 29 33 37 41 44 47 Experiment two 4 6 10 14 18 22 26 30 35 38 41 44 Average 4.5 6.5 10.5 14.5 19 23 27.5 31.5 36 39.5 42.5 45.5 Using 0.75 molar 7 14 23 30 37 43 50 54 56 61 64 67 Experiment two 7 13 22 29 36 41 46 52 54 58 61 64 Average 7 13.5 22.5 29.5 36.5 42 48 53 55 59.5 62.5 65.5 Using 1 molar 13 27 37 47 55 60 66 72 74 76 79 83 Experiment two 13 27 37 48 57 63 67 74 76 78 83 85 Average 13 27 37 47.5 56 61.5 66.5 73 75 77 81 84 Using 1.5 molar Experiment two Average Using 1.75 molar Experiment two Average Conclusion: Following the results of my tests I can safely conclude that my experiment was a success. My prediction at the beginning was correct and the experiment went exactly as I had planned. I can say now that the more particles you cram in to one space the faster the reaction time. As I increased the concentration of the acid, the speed in which it reacted also increased. ...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

# Related GCSE Aqueous Chemistry essays

1. ## The Effect of Concentration on the Rate of Reaction when you React ...

3 star(s)

I think that my results were quite accurate and precise because they were recorded to the nearest second. However, there was one anomaly and this was a result of performing three attempts and taking the average. Somewhere in the three attempts, the results were lower than expected so I obtained an anomaly.

2. ## Find out how the concentration of nitric acid affects the rate of reaction between ...

and try to do all my tests in one lesson so there is no substantial heat change. The only thing am going to change is the concentration of the acid. Apparatus . Nitric acid . Conical flask . Marble chips .

1. ## The action of amylase and pectinase in varying amounts when clarifying cloudy apple juice.

The syringes will all be clearly labelled and will not be used for any other things to avoid contamination. The apparatus was set up as shown in the diagram below. Risk assessment: Amylase can be an irritant so I will wear plastic goggles to protect my eyes and use a spatula when handling it and take care.

2. ## Investigate how the concentration of 10 ml of hydrochloric acid affects the rate of ...

Section 3 This section was not necessary since I only have one independent variable Section 4 Information from secondary sources/preliminary work Unfortunately I have no secondary sources for this investigation but i carried out some preliminary work at the start to see whether or not one of my results was accurate.

1. ## Investigating the effect of concentration on the rateof reaction between marble chips and Hydrochloric ...

If the acid were less reactive the reaction would take place slower, therefore less carbon dioxide would be produced overall, and at a slower rate. Proving the Prediction On the whole, my prediction was more or less right. As the acid got weaker, the amount of gas produced, decreased, apart from at the 70% concentration, where it instantaneously increased.

2. ## How much Iron (II) in 100 grams of Spinach Oleracea?

and Potassium Manganate (VII) (aq). Background Theory Spinach Oleracea contains a large concentration of Iron (II) but much of it is locked up in insoluble ethandioate (oxalate) complexes (2). Potassium Manganate (VII) oxidises the oxalate. The reaction is slow at room temperature and so will be carried out at 70oc.

1. ## to investigate how the concentration affects the rate of the reaction

Therefore, from this preliminary experiment, I have decided to do the following things for my real experiment: 1. The amount of magnesium to be used will be reduced to 0.06gramms. I have decided to use this amount because if a lower amount is used (like 0.05)

2. ## How voltage and acidity affects the rate of electrolysis.

I will have to hold the tube while the reaction is taking place once I turn the power cell on. * After that, I will turn on the power supply on and to 2 volts which at the same time a partner or friend of mine must start the stop-clock.

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