• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigation into the effect of concentration on the rate of reaction between calcium carbonate and hydrochloric acid

Extracts from this document...

Introduction

Investigation into the effect of concentration on the rate of reaction between calcium carbonate and hydrochloric acid. Introduction Equation: Calcium carbonate + hydrochloric acid carbon dioxide + water + calcium chloride CaCO + HCl CO + H O + CaCl During this reaction Carbon dioxide is formed. We measured the rate of reaction by collecting the Carbon dioxide in a gas syringe and timing how long it takes to collect 30cm of gas in the gas syringe. Variables that Affect the Rate of Reaction: -Concentration- if there is a higher concentration of acid then there will be a faster rate of reaction because there will be more reactant particles per unit volume, so there will therefore be more successful collisions occurring. -Temperature- if the temperature is higher there will be a faster reaction rate. This is because the average kinetic energy of the particles will be higher and therefore the collisions will have more energy so successful collisions will increase. -Size of chips (surface area)- If the marble chips are larger then there will be more surface area exposed and so there will be a faster reaction rate due to more successful collisions occurring. -Catalyst- A catalyst lowers the energy needed for successful collisions. So the reaction rate will therefore be faster. ...read more.

Middle

If the concentration is higher then there will be more particles per unit volume. Observations The only possible anomaly that I can see from the preliminary results table is the result for time taken to collect 30cm of gas, and the concentration of acid being 12. Results for actual experiment. Concentration of solution moles dm 3 Volume of Acid moles dm 3 (cm ) Volume of Water (cm ) Time taken to collect 30cm of gas (s) (1st test) Time taken to collect 30cm of gas (s) (2nd test) Time taken to collect 30cm of gas (s) (3rd test) Average time taken to collect 30cm of gas (s) 2.0 20 0 6 7 8 07.00 1.8 18 2 9 9 10 09.33 1.6 16 4 11 10 10 10.33 1.4 14 6 13 12 11 12.00 1.2 12 8 15 10 14 13.00 1.0 10 10 18 17 19 18.00 Rate of reaction: 1/time Concentration of solution moles dm 3 Rate of reaction s 1 2.0 0.14 1.8 0.11 1.6 0.10 1.4 0.08 1.2 0.08 1.0 0.06 Analysing I have found from my results that my prediction was correct and that as the concentration of acid increases, the rate of reaction increases, and as the concentration of acid decreases, the rate of reaction decreases. ...read more.

Conclusion

There are still some factors that could cause an anomaly using this method, for example, human error. Reactions could be delayed when starting the stop clock. Other anomalies could have been because the gas syringe could have stuck, also, even though we did our best to keep the chips the same size, we could not guarantee they would be the correct size. This would alter the rate of reaction to make it faster or slower. We could possibly have ruled this out by getting a machine to cut the marble chips into precise sizes, but this would take a long time and would be impractical, and is therefore beyond our control. The temperature could also have changed, even though we attempted to keep it the same, although we did not measure the temperature with a thermometer. This was also beyond our control as we did not have the equipment to keep the temperature at a constant level. Another problem that we found was that one of the boiling tubes broke during the experiment and a small bit of glass had fallen out of the bottom of it. This was faulty equipment. Other than these possible reasons I can conclude that the experiment as fairly and accurately as possible with the equipment and conditions that we were operating in, and that the results are valid. ?? ?? ?? ?? Charlotte Bell 10A ...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

See related essaysSee related essays

Related GCSE Patterns of Behaviour essays

  1. Marked by a teacher

    The Effect of Concentration on the Rate of Reaction between Hydrochloric Acid and Calcium ...

    3 star(s)

    Also it has been discovered from these results the more there is of one variable the higher the rate of reaction, for example: large surface area, high temperature and more catalyst, will produce a high reaction. Therefore it can be decided that this experiment has helped to plan the prediction

  2. Effect Of Substrate Concentration On The Activity Of Catalase

    Time (s) Volume of oxygen gas evolved - 1.5% Volume of oxygen gas evolved - 3% Volume of oxygen gas evolved - 6% 10 26.3 37.3 50.0 20 43.5 56.3 76.7 30 57.7 74.5 93.3 Analysing From looking at the calculations of the rate of reaction I can say that all three concentrations of hydrogen peroxide (1.5%, 3%, 6%)

  1. The Iodine Clock Investigation

    KI, and H2SO4). Through carrying out these experiments, I must also determine which concentrations must be used in the main experiment, bearing in mind the following points: 1. Whichever substance is being investigated, the other reactants must be in excess 2.

  2. Haber Process for the Production of Ammonia

    The catalyst will not change the equilibrium composition of the substance. Economic issues for industrial production: For Haber process reaction vessel is made from reinforced steel and is usually 20 meters high with a mass up to 200 tons. The cost of making the reaction vessel is high.

  1. Investigating the effect of enzyme concentration on the hydrolysis of starch with amylase.

    This will mean that all the tests will be the same, so the experiment should be accurate and most of all fair. All other variables will kept constant throughout the experiment. The pH level also influences the rate of reaction, so it must be kept constant.

  2. Investigation into the factors that effect the rate of reaction between calcium carbonate and ...

    Catalyst: a catalyst is a substance that changes the rate of chemical reaction but remains chemically unchanged itself at the end of a reaction. The Collision Theory ( the reaction rate): The collision theory is the most common one used to explain the facts about rates.

  1. An Investigation: Factors That Affect The Rate Of Reaction between Calcium carbonate and Hydrochloric ...

    In this table I have experimented 1.5g of calcium powder and 30 ml of 2M hydrochloric acid. For this experiment we can see that it did jump massively to 58 in 10 seconds but as the seconds go by the reading of the gas gradually increases.

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

    we decided we should improve the experiment by adding a larger amount of calcium carbonate because the ratio of hydrochloric acid and water was too much so increasing the the calcium carbonate. We changed our calcium carbonate size because 0.1 was too small and we couldnât observe the reaction to

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