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

GCSE: Patterns of Behaviour

Browse by

Currently browsing by:

Meet our team of inspirational teachers

find out about the team

Get help from 80+ teachers and hundreds of thousands of student written documents

  • Marked by Teachers essays 45
  • Peer Reviewed essays 15
  1. Marked by a teacher

    Hypothesis: some metal carbonates decompose more easily than others when they are heated.

    3 star(s)

    Use a pipette. Wash hands with cold water if lime water comes into contact with skin. It?s harmful. Can cause itchiness and pain. Wear goggles and take care when using it. If there is a spillage tell the teacher immediately. When not using the Bunsen burner use yellow safety flame. Don?t keep the boiling tubes on a blue flame for longer than 2 minutes as could break due to prolonged heat. Tie long hair up out of place to stop getting caught in flame Always follow lab rules.

    • Word count: 852
  2. Marked by a teacher

    Rates of Reaction Practial

    3 star(s)

    - Calcium Carbonate Powder (5g) - Hydrochloric Acid 1M (100ml) - Spatula - Accurate Scale - Stopwatch Method: 1. Collect all of the equipment and measure 5g of each size of surface area of Calcium Carbonate with a spatula. 2. Collect 100 ml of Hydrochloric Acid into one of the 400ml beakers. 3. Place the other beaker on the scale and then set the scale measure to zero. Pour the 100ml of HCl into the beaker on the scale. 4. Hold a stopwatch in one hand, and place the large CaCO3 chips into the beaker containing HCl. Start the stopwatch as soon as the chips contact with the surface of the acid.

    • Word count: 839
  3. Marked by a teacher

    Science Rate Of Reaction

    3 star(s)

    The effects of surface area: The effects of concentration: The effects of temperature: 2mph 25mph In order to calculate the rate of reaction I will use this formula: 1 Average time When sodium thiosulphate solution reacts with hydrochloric acid a solid is formed. The time taken for a certain amount of sulphur to form can be used to indicate the rate of reaction. In this experiment the effects of the concentration of the sodium thiosulphate on the rate of reaction is investigated.

    • Word count: 671
  4. Peer reviewed

    Temp labreport

    5 star(s)

    Therefore, increasing the temperature increases the energy between the particles and makes them move around a lot more and collide more often. Hypothesis: - The rate of reaction has a positive relationship with the temperature of the Hydrochloric Acid. Apparatus:- 1) Test tube 2) Rubber tube (a.k.a. delivery tube) 3) Measuring cylinder X2 [1-10ml, 1-100 ml] 4) Rubber Bung 5) Stopwatch 6) HCL - 150ml 7) 5x 3 cm of magnesium ribbon 8) Trough full of water 9) Beaker - 400ml 10)

    • Word count: 851
  5. Peer reviewed

    Formula of Magnesium Oxide

    4 star(s)

    mass of crucible and magnesium after heating: 15.18g ? mass of magnesium before heating: 0.90g ? mass of magnesium oxide: 0.97g ? mass of oxygen: 0.07g Changes occurring during the reaction: � Magnesium stripe glowed and burned bright orange � Sparks appeared on the surface of the magnesium stripe � Started to shrink and change into white powder form but still glowing This shows that magnesium has reacted with oxygen to form magnesium oxide, a white powder. Appearance of contents at the end of experiment: � White powder � Not in a shape of a coil Number of moles of magnesium and oxygen in magnesium oxide: moles = mass moles = mass molar mass molar mass

    • Word count: 847
  6. Peer reviewed

    Rate of Reaction Lab

    4 star(s)

    The variables are as follows: Independent Variable: I shall be changing the surface area of the Calcium Carbonate to prove or disprove that it actually makes a difference to the rate of reaction. Dependant Variable: The Carbon Dioxide given off will be my dependant variable in this experiment. Control: I shall try to control the amount of Calcium Carbonate and acid in each experiment, so it is as close to being the same as possible. Apparatus: -Beaker -Measuring Cylinder -Calcium Carbonate -Scales -Hydrochloric Acid (0.4M)

    • Word count: 705
  7. Peer reviewed

    displacement reactions of metal

    4 star(s)

    Iron will displace copper only as it is a less reactive metal. And copper will not be able to displace any metals because it is a very weak metal. * Method 1. I had placed the three pieces of the four different metals on a tile containing twelve holes. 2. Then I added the aqueous solution that is magnesium solution, iron solution, zinc solution & copper solution onto the different metals.

    • Word count: 414
  8. Free essay

    rate of reaction

    3 star(s)

    A reaction which is over in a fraction of a second is a very fast reaction. We say it has a high rate of reaction. As the time taken for the reaction to be completed increases, the rate of reaction decreases. What factors affect the rate of reaction? The effect of increasing concentration on the rate of reaction is relatively easy to predict qualitatively. It is not possible to be sure of a quantitive relationship without carrying out experimental studies.

    • Word count: 784
  9. Peer reviewed

    Who's cheating on the vinegar?

    3 star(s)

    I will do this by using a technique called Titration. Vinegar is ethonoic acid What is Titration? Titration is a form of neutralisation. This is a process of determining the concentration of a substance in solution. A measured amount of a known solution concentration (molarity) is added to an unknown volume of a second solution in carefully measured amounts until a reaction of definite and known proportion is completed. Neutralisation is when a Hydrogen ion and a Hydroxide ion react together to form water which is neutral. + - H (aq) + OH (aq) � H2O Variables: * Amount of acid (vinegar)

    • Word count: 877
  10. Peer reviewed

    There are certain factors that affect the rate of reaction the four main factors are:

    3 star(s)

    a slow reaction like rusting an explosion is a fast reaction. There are certain factors that affect the rate of reaction the four main factors are: Temperature: When gasses or liquids are heated the particles gain kinetic energy and move faster.

    • Word count: 212

Marked by a teacher

This document has been marked by one of our great teachers. You can read the full teachers notes when you download the document.

Peer reviewed

This document has been reviewed by one of our specialist student essay reviewing squad. Read the full review on the document page.

Peer reviewed

This document has been reviewed by one of our specialist student document reviewing squad. Read the full review under the document preview on this page.