Rates of Reaction Investigation

Rates of Reaction Investigation
Rates of Reaction Investigation You are to plan obtained evidence, correctly presented and use it to draw conclusions and evaluate your work. You are to study the effect of concentration on the reaction of hydrochloric acid and sodium Thiosulphate. This reaction produces a white solid witch clouds the mixture. (The scientific word for this is precipitate.) The gas sulphur dioxide is produced. Prediction: I predict that as the water dilutes the volume of the thiosulphate, it will take longer for it to change into a cloudy mixture. Explanation: The reason why a fink this is because, the lower the concentration the less particles there are to collide with each other. Therefore the rate will be slower in a given time.
The reason for this is because the particles are more spaced out throughout the solvent. Equipment: 1 Stop clock 2 Conical flask 3 Sodium Thiosulphate 4 Hydrochloric acid 5 Black ?X? on a piece of paper 6 Water 7 Thermometer 8 Measuring cylinders x3 9 Glass beakers x2 To make this a fair test I will keep the hydrochloric acid the same throughout. Method: 1 Collect the equipment and label the beakers ect. So they don?t get mixed up and ruin the test. 2 Get a piece of paper mark and ?X? and make it look bold so it stands out. Then put the conical flask over it. 3 For the first experiment put 50 ml3 of thiosulphate 10 ml3 of hydrochloric acid and 10 ml3 of water into the conical flask. Repeat the experiment like shown on the results table. 4 Start stopwatch, and mix the contents of the conical flask 10 times in an anticlockwise direction. 5 When the solution turns cloudy, so that you can?t see the ?X? stop the stopwatch and record the time. 6 Check and control the temperature to make a fair test. Risk Assessment === The first thing I am going to do is look up all the possible dangers when doing the experiment. I am to do a list of all the dangerous chemicals, which I am, using and what chemicals are produced. Using 1 Sodium Thiosulphate 2 Hydrochloric Acid Produced -??- - Sulphur dioxide Sodium Thiosulphate Sodium Thiosulphate have mineral hazards but are only harmful if ingested in large quantity, it is an irritant therefore it is important to wear goggles, but it?s a minimal hazard but could cause irritant 2 your eyes and skin. Hydrochloric Acid It may cause harm to the eyes therefore 1 will need to wear safety goggles while doing the experiment it is a low hazard. Sulphur dioxide It?s corrosive. It can irritate eyes and respiratory system it is important to use goggles and be cautious when using it. It may trigger asthma attacks, therefore it is important to pour away after finished and make sure all windows are opened. Evaluation I think that the quality of my evidence I collected was good because I had 13 out of 15 results were accurate, I no this because of the line of best fit on my graph. The other two results were anomalies I think this because the readings may have been wrote down incorrect or when the Thiosulphate, Hydrochloric Acid or water was measured incorrect. To improve this if I was going to do the experiment again I would ask someone to check the times and the measurements, and get the same person to see if the mixture was cloudy and try and do it from the same eye level. Overall a think that the evidence was sufficient because nearly all my results were accurate, and it supports my prediction. ?As the water dilutes the volume of the Thiosulphate, it will take longer for it to change into a cloudy mixture.?

Rates of Reaction Investigation 7.2 of 10 on the basis of 2046 Review.