• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13

Investigate the effect of concentration in the rate of a reaction.

Extracts from this document...


BY DARREN HALIL 10 MAL Preliminary Work. Aim- Our aim is to investigate the effect of concentration in the rate of a reaction. Method- Below is a step-by-step guide to exactly what we did to do the experiment. The first thing we did or we do in any experiment involving acid is put on safety goggles so we do not ruin our eyes. > We then went and gathered up the equipment to complete the experiment. The list is below: > A Balance (scales) > A gas syringe (100 cm cubed) > 3m Hydrochloric acid > A conical flask. > A clamp stand > A Beaker > A Measuring cylinder > Three grams worth of marble chips > Stopwatch * We measured twenty millilitres of Hydrochloric acid in the measuring cylinder we then poured the Hydrochloric acid into the conical flask. * We then got a square piece of paper and then placed it on the balance. We pressed the button with the T symbol on it; this then turned the units to zero grams. * We then got the tub of marble chips and measured out three grams of marble chips. * We then put the marble chips into the hydrochloric acid that we poured into the conical flask, and then we quickly put the cork ,that was on the end of the gas syringe, into the top of the conical flask. ...read more.


This reaction is reacting slowly. The catalyst is then added, this makes the reaction increase in speed; however, the catalyst is not physically or chemically changed. Method > The first thing we do in any experiment involving acid is to put on a pair of safety goggles. > We then went and collected the equipment from the equipment trolley. The equipment is listed below...... > Clampstand > Measuring Cylinder (100 ml) > Gas Syringe (100cm cubed) > Hydrochloric acid (three molar) (20 ml) > A balance (scales) > Conical flask > Beaker > Stopwatch > Two grams of marble chips * We set up the clampstand by standing it up right. We then opened up the arm on the clampstand and placed the gas syringe into the open arm of the clampstand and twisted the key on the side of the clampstand arm to close it. We made sure that the units were visible to us so that we could take the readings during the experiment. * Once the gas syringe was set up , we got the marble chips and went over to the balance. We got a rectangular piece of paper and placed it onto the balance. We then pressed the button with the T sign on it. This then put the units to zero. ...read more.


The results proved that we did each part correctly. The concentrations of the molars we experimented on, we had to make ourselves. To measure the amount of concentrated acid (ml). We knelt down to eye level to measure, because if we stood up and read it , we would be looking at it from a different angle ; therefore, we would have been getting a different reading. The results were abnormal, already said earlier, some of the lower concentrated acids reacted faster. This may have been because of change in room temperature, or most probably the surface area of the marble chips. We could have made two grams of marble chips from a lot of small ones or a couple of big ones. There were a lot of thing we could have done to improve the experiment. For example we could have controlled the room temperature by turning of the heating. We would have would have also restricted the amount of people in the class. The reason would be because it would reduce the overall body temperature. We would also have used a bigger gas syringe. We were only restricted to syringes that could hold one hundred cubic cm's worth of carbon dioxide. We would also have changed the amount of concentrations we did. We would have done a 0.5 molar test aswell. We also would have probably increased the amount of marble chips to three grams. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Physical 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 AS and A Level Physical Chemistry essays

  1. Marked by a teacher

    Finding out how much acid there is in a solution

    The colour you see will be a mixture of the two (orange). There is a 50/50 colour, due to equal concentrations of acid and alkaline. Sodium Carbonate: In this investigation, there will be a chemical reaction between sodium carbonate and sulphuric acid.

  2. Investigating the rate of reaction between peroxydisulphate(VI) ions and iodide ions

    Substituting this into the gradient gives: Therefore, the activation enthalpy for this investigation was + 43 kJ mol-1 Rate determining step. The rate equation shows that only the concentration of iodide ions and peroxydisulphate ions affect the rate of reaction.

  1. Investigating how concentration affects rate of reaction

    For example, if the temperature is increased from 293K to 303K, a change from 20 to 30�C, the factor increase can be calculated as follows: 300 310 = 1.016 This is an increase of 1.6% for a temperature change of +10�C.

  2. Investigating the rate of reaction between marble chips (calcium carbonate) and hydrochloric acid.

    Safety For this experiment to be carried out safely, I need to be careful as I will be using a corrosive liquid. I will wear hand gloves to protect my hands from direct contact of hydrochloric acid. In addition, if there is contact with the body at anytime, I will

  1. Neutralization investigation

    Using two different strengths of acids will show how substances differ, but how which are both acids or alkalis share similar properties. I will repeat any results that are not similar per every different molar strength of acid I use.

  2. How do we make Magnesium and Hydrochloric acid react faster?

    84 87 32 33 31 32 75 93 94 92 93 40 40 41 40 90 Reaction Stopped 46 46 44 45 105 50 52 51 51 120 58 59 62 60 135 61 60 62 61 150 67 67 68 67 165 71 71 73 72 180 75 74

  1. The Determination of rate equation

    - 8cm3 of HCl with 37cm3 of distilled water - 12cm3 of HCl with 33cm3 of distilled water - 16cm3 of HCl with 29cm3 of distilled water - 20cm3 of HCl with 25cm3 of distilled water. Apparatus: -Chemical - Hydrochloric Acid - HCl Sodium thiosulphate - Na2S2O3 Distilled water - H2O; Added to dilute the solutions.

  2. Individual investigation - Reaction to be studied Rate of reaction between propanone and ...

    > Rinse the watch glass at least twice so that maximum measured mass is dissolved into the beaker. > With the help of glass rod, stir it until the solid is dissolved in the beaker. > Transfer the solution to the volumetric flask from the beaker and rinse the beaker at least twice with distilled water.

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