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

To compare the mass of ammonium chloride to its temperature change when water is added to it.

Extracts from this document...


To compare the mass of ammonium chloride to its temperature change when water is added to it. Aim: To see the temperature change when different amounts of ammonium chloride are added to water. Resources: Before doing the experiment I looked at the book "The Material world" and "GCSE revision guide" and have found information on endothermic reactions. I have highlighted the relevant information in my scientific knowledge. This information will help me make a prediction. Scientific Knowledge: There are two types of reactions, exothermic and endothermic reactions. I will be concentrating on endothermic reactions as the reaction I am to plan is going to be endothermic. An endothermic reaction is when energy is gained, and therefore the temperature of the reaction decreases when the two substances are mixed. So when a solid dissolves, energy is used to break up the giant lattice. The energy used is greater than the energy released by the water molecules that surround the dissolved ions, therefore temperature falls. ...read more.


Variable: The variable in the experiment will be the mass of the ammonium chloride, which I will be putting random amounts of in to the water so that I obtain good results to make a graph. The volume of the water in which the ammonium chloride will react with will remain constant at all times (50ml). We will be doing the experiment in a classroom so the temperature should not change and will remain constant so that heat doesn't affect the experiment. The same amount of stirs of the solution will be applied to each test, each time so that we help each reaction the same, in helping the break up of the lattice, so that it is fair. The thermometer each time will be left in the water before the ammonium chloride is added for a few minutes to make sure it is at the correct temperature. Fair test: To make this a fair test we will use electronic weighing machines to weight out the ammonium chloride so that the mass is recorded properly and is correct to 2 decimal places. ...read more.


A stirring rod, to stir the solution. Polystyrene cup, to contain the solution and act as an insulator. A glass beaker, to hold the polystyrene cup securely. A thermometer, to measure the temperature before and after the reaction. A spatula, to obtain the ammonium chloride from its container on to the scales. Ammonium chloride. Diagram: Method: 1. Set up apparatus as shown. 2. Now measure out 50ml cubed of distilled water and pour it in the polystyrene cup. 3. Now measure the temperature of the water, and record it. 4. Now weight out different amounts of ammonium chloride starting with little and then more. 5. Now record the mass of the ammonium chloride and tip it in to the polystyrene cup and stir with the stirring rod. 6. You keep stirring for 1 or 2 minutes and watch for the lowest temperature the thermometer gets to and record that result. 7. Do this for each mass 3 times and work out an average temperature change. 8. Do 2-7 for at least 6 different masses and display them in a table like this, why p[aln is good Graph: Analysis: Evaluation: James Allchin ...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 Classifying Materials 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 Classifying Materials essays

  1. Determining the water of crystalisation

    * mass of crucible with lid and salt - 44.92 (?0.01 g) Tab 1. Mass of crucible with lid and salt according to the change in time of heating. Number of measurement Time of heating (since last measurement) [min] Mass of crucible with lid and salt [?

  2. Affect of concentration on reaction

    0.9340 0.9490 0.9415 20 0.9500 0.9590 0.9545 25 0.9590 0.9660 0.9625 30 0.9670 0.9740 0.9705 35 0.9740 0.9850 0.9795 40 0.9800 0.9850 0.9825 45 0.9860 0.9930 0.9895 50 0.9920 0.9980 0.9950 0.8 M Time (s) 1st Mass Loss (g) 2nd Mass Loss (g)

  1. The role of mass customization and postponement in global logistics

    * The process by which custom-designed products are offered to more consumers at ever lower prices. (http://www.preferredgroup.com/Glossary/m2.htm) * A manufacturing environment in which many standardized components are combined to produce custom-made products to customer order. (http://highered.mcgraw-hill.com/sites/0072394668/student_view0/chapter2/glossary.html) * Shorthand for high variability in marketing.

  2. Investigation into how mass affects the rate of fall.

    If this happened then the experiment might show different types of results I will keep the same person recording the time it takes for the cake case to fall. This is because people have different reaction times and this could affect the time when they stopped the stop-clock.

  1. Finding the empirical formula of aluminium chloride.

    silver ions react with the chloride ions according to the following reaction: Ag+(aq) + Cl-(aq) AgCl (s) Hence from the stoichiometry, we find that the ratio n Ag+ : n Cl- is 1:1 ? n Cl- = n Ag+ = 2.2375 x 10-3 mol 3.

  2. An experiment to investigate the factors that determine the amount of energy released when ...

    alcohol, just by putting the number of carbon atoms in contains into the formula. I am then going to divide the molecular mass of each alcohol by the constant number that I choose. I will choose this number in my preliminary work.

  1. Our experiment consisted of two samples of water containing unknown substances, and our objective ...

    Calculate the concentration of the dissolved solid in the water sample (g dm3). 17. Repeat from step 5. Obviously, you don't have to do certain things like 'Set up the scales by plugging it into the socket', since it's already set up.

  2. Which equatoin is correct

    1/2 Cu2O (s) + CO2 (g) + 1/4O (g) This tells us that by decomposing one mole of CuCO3, half a mole of copper oxide, one mole of carbon dioxide gas and a quarter mole of oxygen gas are produced. Since both carbon dioxide and oxygen gases are collected together, the total volume of gas produced is 1.25 moles.

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