I am going to carry out an investigation on finding out the effect of heat on rate of reaction. The input variable I am changing is temperature. I will do this by increasing or decreasing temperature. The lowest reading being 30 and the highest being 80 degrees Celsius, timing will vary and be carried out at every increase in 10 degrees. I will be using Sodium thiosulphate and hydrochloric acid to carry out this investigation. To ensure accuracy I will do the experiment three times. However when carrying out this investigation it is vital to take precaution and this is why I will have to wear goggles to protect my eyes from any harmful substances I will be handling. I will also put on gloves, which will prevent the acid from coming into direct contact with my skin just in case it may spill on my hand. This is because corrosive and may eat away my skin.

I intend to record and present my results using a table of results and in graphic form. I will make a line graph and present the line of best fit, which clearly brings out any anomalies and any inaccurate readings.

Equipment: Thermometer, Stopwatch, Conical flask, Bunsen burner, Tripod stand, Measuring cyli

My scientific explanation for this reaction was that particles are always in constant movement, but can not move about freely. However, hydrochloric acid particles are made up of different sort of particles. It contains water molecules and hydrogen and chlorine ions. When the particles react, the hydrogen ion will collide with the Sodium Thiosulpate particles. The harder they hit the particles react together. Anything which makes the acid and thiosulphate particles to collide more often speeds up the reaction. This is why I altered the temperature, which in turn will heat up the Sodium Thiosulphate particles causing them to move faster. As a result more effective collisions were carried out, more often with more gained kinetic energy.

I predict that as the temperature increases by 10 degrees the rate of reaction doubles. This is because at low temperatures the particles reacting do not have that much energy to react. However when substances are heated, they gain kinetic energy and this causes them to move faster and collide more often. As this occurs bonds are broken between particles and new ones are formed. This is because the collisions have more energy and collisions are successful. Therefore the higher the temperature, the faster the cross disappears.

The plan was followed accordingly. Errors that occurred obtaining my results that might have made it less accurate were with the timing. I might not have been able to stop the stop- watch when required. The results fitted the pattern that I found as we see that at low temperatures, the rate of reaction was slow. Yet at increased temperature, the rate of reaction was faster.

Some topics in this essay:
Sodium Thiosulphate, Rate Reaction, Stopwatch Conical, Reaction Rate, Water Collisions, Fair Test, Prediction/ Hypothesis, Results Looking, rate reaction, Sodium Thiosulpate, Universal Indicator, sodium thiosulphate, hydrochloric acid, temperature rate reaction, temperature rate, reaction rate, heat sodium, 10 degrees, temperature readings, low temperatures, line fit, rate reaction temperatures, collisions particles reaction, heat sodium thiosulphate, faster rate reaction,