• 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

# Investigate a variable that affects the rate of reaction between calcium carbonate and hydrochloric acid.

Extracts from this document...

Introduction

Rates Investigation Aim: - Investigate a variable that affects the rate of reaction between calcium carbonate and hydrochloric acid. I am going to investigate how the strength of the hydrochloric acid affects the rate at which the products are given off between the acid and the calcium carbonate. Preliminary Work: - For my preliminary work I looked at the products of 0.25M and 2M hydrochloric acid and calcium carbonate. Since the variable is the strength of the acid I kept everything else the same to ensure it was a fair test. I used 10cm3 of each acid measured in a measuring cylinder, a marble chip that weighed 0.7g and I measured the rate of the reaction by seeing how much carbon dioxide was being given off every 30 seconds for four minutes. To find out how much carbon dioxide was given off I used a measuring cylinder full of water and when carbon dioxide was given off it would rise to the top of the cylinder and I could measure the amount given off by seeing how much carbon dioxide was given off. ...read more.

Middle

-5 different strengths of hydrochloric acid -Conical flask with rubber stopper to put the acid and marble chip in -Delivery tube for the carbon dioxide to travel through -Scales to measure the mass of the marble chip which should be 0.7g -Safety goggles to protect eyes against acid spillages Fair Test To make it a fair test the only variable of the experiment will be the concentration of the acid. Everything else will be kept the same. This includes the mass of the marble chip so you can only have one marble chip otherwise there will be more surface area for the acid to react with making the rate of the reaction faster. The amount of acid as if there is more acid then it will have more energy for the particles to collide and react with each other. Results See tables and graphs Conclusion According to these results the hypothesis is correct. My evidence shows me that there is a clear relationship between how fast a reaction takes place and the concentration of the acid. As the concentration of acid increases, the rate of reaction increases. ...read more.

Conclusion

This may have occurred because the consistency of shaking the conical flask was not the same making some results have higher rates than others or the accuracy of the results. To make this practical method more reliable you could again repeat the experiment more times and take more readings for example every 15 seconds opposed to every 30 because this would then enable you to see where it the experiment was going wrong. Also you could extend it for more than 4 minutes because eventually you would expect to find the line curling off because most of the acid particles would be used up making there be less energy for the particles to collide and react. Extra practical work I could do to back up my conclusion would be to look at the other factors affecting the rate of reactions, which are; Temperature As the temperature increases in a reaction the rate of the reaction increases because the higher the temperature the faster the particles move and collide increasing the reaction. Smaller pieces of Marble Breaking up the marble would increase the reaction rate because this increases the total surface area making more particles of the solid have contact with the acid. Catalyst Using a catalyst increases the rate of a reaction but they are not used up. Alice Goode 1 08/05/07 ...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. ## In this project I am going to investigate rates of reaction of an indigestion ...

3 star(s)

Also in the preliminary experiments I worked out a good volume of gas to collect (see page 7). It does rely on human judgement (in starting and stopping the stopclock) but all other methods involving timing do also. Within this, there are two different ways that the gas given off

2. ## What affects the rate of a reaction? The reaction I will be investigating is ...

3 star(s)

Downward displacement of water - This simply refers to the collection of gas using water. In this instance carbon dioxide is collected when it is given out from the reaction over time and is collected by an upside-down measuring cylinder filled with water, submerged under water so the gas rises to the top of the cylinder.

1. ## The aim of the experiment is to find out the rate of reaction at ...

To find out what temperatures to use, I experimented with temperature from 20-800C. From 600C onwards up to 800C the rate of reaction was the same. For this reason in the actual practical I will only use temperatures ranging from 20-700C.

2. ## Measuring the Rate of Reaction between Hydrochloric Acid and Calcium Carbonate

I also must make sure that all the small marble chips that I use are roughly the same size, amount and mass, as if one is larger, it could throw the whole experiment off. I will be keeping the mass of calcium carbonate small chops constant, the temperature at which the reaction will occur constant.

1. ## Close Your Eyes

I threw it on and then got out of bed. Danny's footsteps were getting closer as I ran around Dougie's room frantically picking my clothes up. Where was my underwear? Where the fuck was my underwear? "Louise! He's close I can hear him.

2. ## Chemistry Cwk Rates of reaction: Investigating One Factor Which Affects How Fast Calcium Carbonate ...

Although it is probable that the results were anomalous, the preliminary experiment involving 0.5M acid was very unsuccessful. However, the preliminary experiment involving 1M nitric acid produced a good range of results which lead to believe that 0.5M should at least of returned something, especially as the reaction was still

1. ## Investigating the rate of reaction between hydrochloric acid and calcium carbonate

make sure the whole measurement is put in the conical flask pour mass of calcium carbonate into conical flask immediately start the stop watch observe how long it takes for the calcium carbonate to dissolve wash conical flask for accuracy repeat the following steps a further 2 times for each

2. ## Investigating how the concentration of acid affects the rate of reaction between hydrochloric acid ...

Preliminary Experiment Results Volume of beaker and contents (cm3) Volume of CO2 produced (cm3) Time (seconds) 0.1 molar 0.5 molar 1.0 molar 0.1 molar 0.5 molar 1.0 molar 0 135.3 136.16 134.96 0.00 0.00 0.00 30 135.3 136.13 134.86 0.00 0.03 0.10 60 135.3 136.09 134.79 0.00 0.06 0.17 90 135.29 136.07 134.79 0.01 0.10 0.22 120 135.29 136.04

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