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

Investigation looking At the Speed of Reactions

Extracts from this document...


Investigation looking At the Speed of Reactions. Introduction The aim of this experiment is to find out how a variable can affect the results from a scenario set up in scientific environment. The experiment is to see how a certain variable will affect the amount of Gas produced from a Calcium Carbonate and Hydrochloric Acid Reaction. The Science Calcium Carbonate is a generally white or colourless mineral that is translucent. When compressed or exposed to great heat the mineral binds together in small to large clumps forming calcium Carbonate Chips, however left in it's formed state it is powder, a chalk like substance. I could use either forms of the Calcium Carbonate for the experiment. Hydrochloric Acid, is a clear, colourless to slightly yellow liquid with a sharp, pungent and irritating odour. It is a strong highly corrosive acid, soluble in water and alcohol but insoluble in hydrocarbons. The reason I am using Calcium Carbonate and Hydrochloric Acid for my experiment is due to the reaction when they are put together. A fizzing reaction takes place letting loose Calcium Chloride, Carbon Dioxide and Water. Word Equation Calcium carbonate + Hydrochloric Acid ===> Calcium Chloride + Water + Carbon Dioxide Symbol Equation CaCO3 + 2 HCl ---> CaCl2 + H2O + CO2 Prediction My prediction is that if the concentration of the acid increases there will be an increase in output of Carbon Dioxide from the reaction for example the highest concentration produce the most gas in the given time. ...read more.


First 50cm3 is a good round number with which to dilute the acid from, replaced 10cm3 of acid each time with 10cm3 of water. Also 50cm3 is a good amount of solution that ensures a reaction will take place and provide noticeable and easily readable results. Equipment Gas Syringe Conical flask Marble chips (CaCO3) Acid (HCl) (2 Molar) Glass Pipete 50ml Measuring Tube Clock Clamp Pole Cork Rubber Tube Electric Scales Glass Beaker Method First, I prepared the apparatus above, I found that the apparatus is good enough to carry out the experiment and get reliable results. First, I will use the top man balance to weigh out 1.5g of CaCO3, which is in marble chip form. Make sure the apparatus is safe and then you will be able to measure out 50ml of acid. This is done using the glass pipette measuring out two quantities of 25ml and then poured into the conical flask. Also, after measuring the CaCO3 you would be able add that to the conical flask. To keep the experiment fair you need to always place the acid first then the Calcium Carbonate or the opposite, this must be done all the time. As you add both reactants to a conical flask, you must immediately place the cork onto the flask. There is also the syringe were the gas is collected and connected to a glass tube and the cork, the gas collected would be CO2. ...read more.


No anomalous results were found or incorporated into the experiment that can be clearly identified, also adding to the accuracy of the experiment. There were a couple of points for the experiment to be improved by, first that by adding the CaCO3 and quickly placing the cork on top will lose time and some of the immediate product is lost. Also that a normal person pressing the time is not the most accurate of techniques. This obviously increases the error percentage in the results making the result outcome slightly incorrect. One way to improve the experiment would be to use a cork with two holes fitted with valves. One to enter the acid and CaCO3 powder and one connected to the syringe for the product of the reactants to be let out. In my view, I find this a more reliable technique. In addition, from the graphs I concluded that after the reaction reaches a peak it slowly comes to a complete halt. This meant that the graph was accelerating at first and then the gradient changed for the curve to become towards a vertical line. Although not indicated on the above graph nor supported by any of the evidence presented in this Investigation I feel that this would be a valuable extension of the product to discover when and where this curving begins and to what extend it occurs. C H E M I S T R Y ALEX WOOD SCIENCE COURSEWORK - CHEMISTRY - INVESTIGATION INTO REACTIONS -1- ...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

See related essaysSee related essays

Related GCSE Aqueous Chemistry essays

  1. Investigate the factors, which affects how quickly Calcium carbonate reacts with hydrochloric acid.

    I think that I did have enough measurement because I repeated my experiment 3 times and I also covered ever angle in my investigation. My method was also very accurate as reflected in the results. But there were one or two problems that I had to solve though.

  2. To investigate the factors that affect the amount energy produced in neutralisation reactions.

    Then collect 25ml of alkali, and do the same as the acid except in a different measuring cylinder. If the acid is Diprotic or Triprotic, and you are reacting it with a Monoprotic alkali then you must use double or triple the volume of alkali in ratio to the amount of acid.

  1. Antacid Investigation.

    Then open the tap and let out 0.5 ml of acid out and shake do this again until it does not turn back to purple. We are letting out only 0.5 ml out because it will make the results more accurate.

  2. Neutralisation Investigation

    my eye was horizontal to the mark where I wanted. I also did this with the mercury thermometer. When I was recording the final temperatures of the reacted/ reacting solution I waited until the temperature was at its very highest so that I could get maximum results for the temperatures.

  1. Aspirin Investigation

    have chosen to use: In step one: Oil of Wintergreen (Methyl Salicylate or Methyl-2-Hydoxybenzoate) O O C C OCH3 ONa OH + 2NaOH ONa +CH3OH +H2O (Sodium Hydroxide) (Methanol + Water) O O C C ONa OH ONa + H2SO4 OH + Na2SO4 (Sulphuric Acid)

  2. An Investigation to Measure the Rates of Reaction between Calcium Carbonate (Marble Chips) And ...

    33 1.18 30 14 12 48 2.20 40 18 14 1.03 3.21 50 22 18 1.16 4.36 60 26 22 1.31 - 70 31 25 1.47 - 80 35 28 2.20 - 90 40 31 2.41 - 100 44 35 2.41 - As the results show the time took for

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

    present in 100 grams of Spinach Oleracea, could be due to the fact that the Spinach Oleracea was boiled in distilled water. I completed this experiment twice using two different spinach extract solutions, which were produced using the same method.

  2. Reactivity Series Investigation

    Fair Test:We are going to make sure that we have the same person in the group doing the stop clock so that it the person will have the same reacrion as some people have more faster reaction than others. We are going to have all the powders mass to 0.5g

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