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

Chemistry Coursework : Neutralisation

Extracts from this document...

Introduction

Chemistry Coursework : Neutralisation Prediction: I predict that the reaction will be endothermic. If we increase the concentration of acid, the temperature change will increase. Background information: Reactions: An EXOTHERMIC REACTION is one which usually one which gives out energy to the surroundungs, usuually in the form of heat and usually shown by a rise in temperature. An ENDOTHERMIC REACTION is one which takes in energy from the surroundings, usually in the form of heat and usually shown by a fall in temperature. ...read more.

Middle

For endothermic reactions the energy change is positive , i.e heat is needed. A exothermic energy change indicates an exothermic reaction, ie heat is released. Virtually all chemical reactions involve energy changes. Whether they are exothermic or endothermic depends on the balance between the energy needed to break bonds in the reactant, and the energy released when bonds are made in the products. Aparatus: 3 Polystyrene beackers 3 Plastic lids 3 Thermometres (-10 - 110*C) 3 Measuring cylinders (50ml) ...read more.

Conclusion

Also we should wait 30 seconds before taking the temperature of each solution. We found out that all in our pilot method would also apply for our real method, as our prediction reflected are results. Method: Measure 20ml of hydrochloric acid and take the temperature after leaving it for 30 seconds. Then in a seperate measuring cylinder measure out 20ml of Sodium hydroxide, pour into a polystyrene beaker, and again take the temperature after 30 seconds. Mix both of them together and record the highest temperature. Repeat this for every temperature as shown in the table below: ...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 Energy, Respiration & the Environment 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 Energy, Respiration & the Environment essays

  1. Marked by a teacher

    Fighter Pilot A Statistical Analysis of Reaction time and its Correlation with Dominant ...

    5 star(s)

    (17)The binding of nicotine in place of acetylcholine causes cholinergic neurons to release more acetylcholine from the brain and thus heightening the neuron pathways. Through these pathways nicotine improves reaction time and the ability to pay attention, making people feel like they can work better.

  2. Biology Beetroot Coursework

    vibrate more energetically until the hydrogen bonds holding the 3D structure of the proteins together breaks therefore denaturing the selectively permeable cell membrane. This allows red pigment to leak from the vacuole and out of the cell by diffusion

  1. Investigating the effects of Sodium Hydroxide concentration on Catalase

    concentrations, by for my 0.1 M I will take 9 cm� of distilled water and 1 cm� for the 1m concentration to make my 0.1M, I will do the same for my 0.01M 9cm� distilled water and 1cm� for my 0.1m, and for my 0.001M 9cm� distilled water and 1cm�

  2. Eyesight coursework

    With very carefully focused laser beams sections are removed from the cornea of the eye thereby altering its focusing power. At present, however, it is only available for dealing with short sight. Describe what presbyopia (old sight) is and how that is corrected During middle age, usually beginning in the 40s, people experience blurred vision when doing things close up.

  1. Discuss the Advantages and Disadvantages of being Ectothermic and Endothermic for Vertebrates.

    Akhmerov found that in certain endotherms oxidative phosphorylation in the mitochondria was uncoupled, thereby producing heat and not ATP (1986). It has been proposed that insulation evolved at first, as this would have limited a fluctuation in body temperature (Crawshaw et al., 1982), aiding specialisation of biochemical processes.

  2. Discuss the Advantages and Disadvantages of being Ectothermic and Endothermic in the Vertebrates.

    Some ectotherms are regional heterotherms, because they can achieve high core (i.e. deep-tissue) temperatures through muscular activity, for example in the skull cavity of some fish. Ectothermy: the low-cost approach to life. Overview of ectothermy: Since ectotherms are unable to produce extra metabolic heat they must regulate their body temperature using external sources for heating or cooling as required.

  1. the effect of bile concentration on the activity of the enzyme lipase during the ...

    experiment the temperature will be different causing the activity of the lipase to drop or increase according to the temperature the experiment is being held at. Carry out experiment in an a thermostatically controlled water bath where the temperature is kept constant at all times By carrying the experiment in

  2. Yeast Coursework

    The lock and key hypothesis is the mechanism of enzyme action. Enzymes are proteins folded into a three-dimensional shape. The part of the enzyme that allows it to act as a catalyst is called the active site, which is shown on the next page.

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