I predict that as the temperature of the acid increases so will the rate of reaction. This is because for two substances to react they have to have a successful collision which means the have to collide with a minimum amount of energy which is called the activation energy. This diagram shows how the particles will react with each other with the minimum amount of energy (activation energy): The higher the temperature of the acid the faster the acid particles will be moving around as they’ll have more energy and there will more collisions. This energy will also allow there to be more successful collisions and so more carbon dioxide will be formed in smaller amount of time. Therefore the rate of reaction will be faster.
Temperature – as we increase the temperature, we increase the reaction rate. Raising the temperature makes particles collide more often in a certain time, and makes it more likely that collision results in a reaction. Catalyst - catalyst is a substance, which speed up a chemical reaction. At the end of the reaction the catalyst is chemically unchanged. Aim: Effect of temperature on rate of reaction.
This will allow me to determine what ratio is needed for the reaction to occur quickest (i.e. more acid than water, the faster the reaction rate). As I mentioned in the aim, I intend to find out what effect the concentration of the acid used will have on the rate of reaction between it and thiosulphate. Therefore, the only variable in this experiment will be the ratio of the concentration of the hydrochloric acid and thiosulphate. To vary this, I will dilute the acid with different amounts of water, changing the ratio of acid to water.
This is because the higher the temperature the more often the particles collide and react, when the particles collide more often they would collide harder because they have more energy, making the collisions bigger and faster, the collision success rate is higher. I will make my investigation a fair test by keeping the quantities of the Hydrochloric acid at room temperature and Sodium Thiosuphate heated as accurate as possible. Also make sure the stop clock is started at the same point each time a measurement is taken. I will carry out the investigation by: 1. Set up the Diagram 2.
Because of this I expect the reaction rate to be quicker when the concentration of the acid is higher. The reaction should however, end on the same amount of gas given off. Rate is measured by the disappearance of reactants and/or the appearance of a product. Prediction When the concentration of acid increases the rate of reaction will increase. I will be able to see the rate of reaction is increasing as the gas is produced more quickly.
It can change how quick the reaction takes place. · Increasing the concentration or a reactant simply means there are more particles which may collide and so react. · More collisions means a faster reaction. Particle Size: If the size of the particle being used is big, the test will take longer but if it is smaller, the reaction will be much quicker. Preliminary Experiment: For this experiment we had to find the rates of chemical reactions using 0.5 and 1ml hydrochloric acids and two magnesium ribbons.
This means that there will be a higher collision and reaction rate of the marble chips molecules with the hydrochloric acid. This should then increase the rate of reaction as the concentration is increased. So the more concentrated the acid the quicker the reaction will take place, because the more concentrated the acid is then it will make the chips react faster and more hydrogen will be given off in a quicker time. The smaller the stones are, the even quicker the reaction will happen, this is because the acid has a smaller surface area to act upon. Planning: In my experiment I will use: *Marble chips (10g per experiment) *Stopwatch- to ensure a fair test.
If the temperature is reduced, the exothermic reaction will increase to give out more heat. The affect of temperature on rates of reaction is important. Raising the temperature makes the rate of reaction faster. Because the temperature increases, the pressure of the molecules increase, causing them to move more faster which will then lead them to bump into each other more frequently. Therefore the molecules are reacting.
.Experiment for Chemistry Coursework For this investigation I am looking at how the concentration of acid can change the reaction and how I can explain this using collision theory. My Prediction: I predict that the greater amount of concentration the faster the reaction will take place. Therefore, particles in the two compounds will collide faster. Due to my prediction if it is correct, I expect to see the cross on the paper disappear faster. As I already know that increasing one quantity will speed up the reaction as the particles are more likely to collide.
How Concentration and Temperature Affects the Rate of Reaction between Magnesium Ribbon and Hydrochloric Acid. WHAT I AM INVESTIGATING I am going to investigate how concentration and temperature affects the rate of reaction between magnesium ribbon and hydrochloric acid. MY PREDICTION The thing which I expect to happen is the more acid added to water the faster the reaction will happen. Also the hotter the solution the quicker the reaction will happen. THEORY TO BACK UP PREDICTION This will happen because when the temperature increases it will give the particles energy which will make the particles move quicker causing more particles to “collide” this will make the reaction quicker.