• 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...

Introduction

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.

Middle

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.

Conclusion

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. Investigating the Factors Affecting the Temperature Change Between Zinc and Copper Sulphate

    This displacement reaction can be shown in the following equation: Zinc + copper sulphate ? zinc sulphate + copper Zn(s) + CuSO4(aq) ? ZnSO4(aq) + Cu(s) Grey Blue Colourless Red Metal Solution Solution Solid Looking at the Reactivity Series of Metals can reinforce this.

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

    so you have to heat the solution with concentrated NaOH, and a smelly gas which turns universal paper blue is produced Al3+ Aluminium White/precipitate soluble Ca2+ Calcium White/precipitate insoluble Cu2+ Copper (II) Blue/precipitate insoluble Fe2+ Iron Green/precipitate insoluble Fe3+ Iron Red-brown (rust)/precipitate insoluble Mg2+ Magnesium White/precipitate insoluble To distinguish between

  2. Investigate a factor that effects the change in temperature between iron and copper sulphate.

    I repeated the investigation three times, which I think was enough as I had reading very similar each time showing that I had carried out the investigation in the same way all three times.

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

    I therefore chose a small 25ml measuring cylinder to use for the experiment. The distance between the burning alcohol and the water I also had to choose a suitable distance between the burning alcohol and the conical flask of water.

  2. Affect of concentration on reaction

    Effect of temperature on reactions Increasing the temperature increases the reaction rate. This is because more energy is given to the particles, so that they move faster, colliding more frequently result in more chance for a reaction to occur. Also the energy given has the effect on greater proportion of collisions to overcome the activation energy.

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

    extend the definition to the five MC Performance Dimensions, namely: Design and new product development, Supplier management and supply chain agility, Production flexibility and capacity management, Variety and inventory management, Communications and information management Design and new product development Satisfy customer interests by efficiently (time and resources/cost)

  2. Redox reactions and the halogens.

    Carbon can form giant covalent structures, diamond and graphite. Each atom forms four covalent bonds with another carbon atom which arrange into a 3D lattice. Properties Not soluble in water Particles have no charge Polar water molecules not attracted to them Don't conduct electricity, no free ions or electrons to carry charge (except graphite where electrons are free to

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