Calculate 20% of water and 80% of Hydrochloric acid for a solution of 150ml in total. Stir the solution in the beaker labeled “ Hydrochloric acid: 80%”. Leave it on the side. Pour 50ml of sodium Thiosulphate in the beaker labelled “Reaction” Now place the “X” under the beaker labelled “Reaction” Pour 50ml of “Hydrochloric acid: 20%” to “Reaction” Start timing Stop timing when the “X” is no longer visible. Record the reaction time in seconds in the data table.
I will then take the finial temperature. Then I will repeat the experiment for the other four fuels, in order to establish which two fuels produced the highest rise in temperature of the water. Method - Comparison: I will then compare these two fuels by heating them until they get to a certain temperature noting down the time every time the temperature increases by 10°C in order to form a scatter graph using line of best fit. I will use step one and most of step two from the preliminary test (first of all, I will make sure I take all of the safety precautions, I.e. tie back long hair, use goggles and make sure the room is well ventilated.
The temperatures are: 20°C, 30°C, 40°C, 50°C and 60°C To start the experiments fill the flask with 50cm³ of sodium thiosulphate into the large beaker. Fill the large beaker up with the water of right temperature that is required for the experiment. Put the thermometer into the flask with sodium thiosulphate and check the temperature is right for the experiment. If the water is too cold, in the large beaker pour in some more hot water or if it is too hot pour in some cold water to reach the required temperature for the sodium thiosulphate. Once the sodium thiosulphate is the right temperature, take it out of the water, wipe the bottom of the flask with tissue paper and place it onto the piece of paper with ‘X’ marked on it.
The Effect of Temperature on the Rate of Reaction Aim: To investigate the effect of temperature on the speed of reaction between: Sodium thiosulphate 25ml Hydrochloric acid 5ml Sodium thiosulphate + Hydrochloric acid Ã Sodium chloride + Sulphur dioxide + Sulphur + Water Apparatus: Â· Beaker Â· Stopwatch Â· Thermometer Â· 25ml of Sodium thiosulphate Â· 5ml of Hydrochloric acid Â· Water bath Safety: Wear goggles at all times just in case a chemical splashes into your eye. Method: Measure the Sodium thiosulphate and pour it into the beaker. Place the beaker into the water bath and wait until it reaches the temperature you are starting the experiment with. Measure the Hydrochloric acid and take the beaker out of the water bath. Pour the acid into the beaker.
5ml of starch was put into a test tube. The test tube was placed into the beaker. When the water in the beaker was at the required temperature the stop clock was started. After one minute 1ml of amylase was put into the test tube with the starch using a syringe or pipette. As soon as the amylase and the starch had mixed a sample was taken from the test tube using a pipette and mixed with the droplets of iodine in one of the chambers of the spotting tile.
Equipment · Trough · Clamp · 100ml measuring cylinder · Stop clock · 10ml measuring cylinder · Delivery tubes · Bung · Conical flask Variables Change The temperature of the reactants: 60 50 40 30 20 10 Control Amount of peroxidase (10ml) Amount of hydrogen peroxide (20ml) Length of experiment (2min) Time between measurements (15sec) Equipment used Safety I will keep my safety goggles on at all times to prevent painful eye injury. Method For accuracy I am using six different temperatures and I will repeat the whole experiment twice. I will record my results in a table. I will then transfer those figures into two line graphs showing gas given off against time. Using these I can then work out the rates of reaction for both experiments and find the averages from the results.
4) Measure the temperature of the solution in the conical flask. 5) Then pour the Hydrochloric acid in the conical flask and start the timer. 6) Look from the top of the conical flask and wait for the "X" on the paper under the conical flask to disappear, once it has disappeared stop the timer and note the time it for the reaction to finish. Repeat this experiment but change the temperature of the mixture of water and Thiosulphate solution before pouring in the acid. NOTE: Make sure that you check the temperature before your pour the Hydrochloric acid in the conical flask; heating the solution to 50Ëš C
In effect increasing the speed of the reaction. Preliminary work: After doing various experiments in my preliminary work I decided to use: -20ml of 2HCl -20ml of H2O -5cm of magnesium ribbon -Starting temperature of 20o -+10o for each experiment -4 experiments -time is measured until the gas syringe reaches 50ml Equipment: Method: 1. I will set up the equipment as in the diagram. Making sure that all equipment is secure and air tight 2. I will heat up the water and hydrochloric acid solution and then take its temperature to make sure the Bunsen burner doesn't heat up the thermometer.
Place a beaker onto the hot plate and drop a metal object in 6. Wait until the water boils and record the temperature to make sure that it is 100 degrees 7. Wait two minutes 8. Remove the metal object from the first beaker and insert it into the second one. 9.
Â· Place the other end of the delivery tube into the test tube. Â· Put the Bunsen burner on a heatproof mat. Â· Place the water bath on the tripod and heat the water. Â· Measure the temperature of the water (in the water bath) with the thermometer. Stop the heating until it reaches 40Â°.