Effect of temperature on rate of reaction. INTRODUCTION The rate of a reaction is the speed taken for a chemical reaction to happen, if that reaction has a lower rate, that means the molecules combine at a slower speed than reaction with a higher rate. Some reactions take thousands of years, while others like our experiment can happen in less than a few minutes. An example of very slow reactions is how long it takes for ancient plants and fish to become fossils, this is called carbonization. The rate of reaction also depends on the type of molecules that are combining, If there are lower concentrations of an essential element or compound, the reaction time might be slower! No matter what, reactions happen, Chemicals are always breaking …show more content…
Measuring cup (if using cups instead of beakers) Thermometer 9 aspirin tablets (3 tablets per test, for 3 trials per temperature) Stopwatch (or phone) Source of hot water (kettle) Ice cubes (or cold water source) Paper to record trials (later transferred into this document) Method Hot water: Boil water until it is as hot as possible. Fill the glass or beaker with exactly 200ml of hot water. Use the thermometer to take the temperature of the water and then record it on your data sheet. Drop 1 aspirin tablet into the water, measure the time required for the tablet to fully dissolve. Repeat this step 3 times for 3 trials, then calculate average on graph. Room temperature water: Fill a beaker or glass with exactly 200ml of room temperature water. Use the thermometer to take the temperature and record it on your data sheet. Drop 1 aspirin tablet into the water, measure the time required for the tablet to fully dissolve. Repeat this step 3 times for 3 trials, then calculate average on graph. Cold water: Fill a glass or beaker with with roughly 120ml of water, add enough ice to adjust the level to 200ml. Stir the ice water and wait until ice is dissolved, make sure water is roughly 200ml, if not add more
Use a stopwatch or timer to determine the amount of time it takes for the tablet to completely stop fizzing out or until it completely stops dissolving.
This experiment will show how the temperature of water will affect how quickly a Alka-Seltzer tablet will dissolve. (Rowland) This experiment seemed appealing to me because it sounded interesting to experiment with chemical reactions. “How does the temperature of water affect how quickly an Alka-Seltzer tablet will dissolve?”
The quicker the tablets will dissolve because there will be more water. particles to collide with. So the rate increases. * If the amount of tablets being used is increased for the same amount of water, i.e. as concentration increases, rate will increase. increase as well because there will be more collisions between particles.
1. Read through the steps in this procedure. Prepare a data table to record the mass of the solute, the initial volume of water, the total volume of water after step 9, and the temperatures at which the solutions began to crystallize.
Place one egg in a beaker. Fill this beaker with distilled water to just cover the egg. See Figure 1. Note the appearance of the water at this time and record your observation in Data Table 3. CAUTION: Be careful to avoid breaking glassware.
My aim is to see the effects of a change in temperature on the rate of
9. Get your stopwatch ready and drop the Alka-Seltzer tablet at the same time you started the timer. 10. When it finishes dissolving (you can see through the water and there is no more fizzing.) stop the timer and record the results. 11.
* It was almost impossible to tell when the Alka-Seltzer tablet had dissolved, each time the experiment was done. This was a huge problem for the experiment as this could have totally caused problems to the experiment. A special type of detector apparatus, which bleeped when the correct amount of Alka-Seltzer tablet dissolved, could improve this, each time the experiment was done.
In a 100ml beaker place 50mls of water, measure the temperature of the water and record this initial temperature onto a table. Set the timer and add one teaspoon of Ammonium Nitrate to the water, stir this continuously until the Ammonium Nitrate has dissolved.
Normal water will not do because of the impurities in it. · Methyl Orange indicator - The colour of this indicates when the sodium hydroxide has been neutralised by the hydrochloric acid. · Conical Flask - This is used to react the aspirin tablets with the sodium hydroxide. It is more appropriate to use as the shape of it makes it less likely that any should spill out. · Burette - This is used to add the hydrochloric acid to the sodium hydroxide.
have the same amount of water to test on. It will also have a roughly
The pH of the solution would alter the rate of the reaction if it was
Chemical kinetics is the study and examination of chemical reactions regarding re-arrangement of atoms, reaction rates, effect of various variables, and more. Chemical reaction rates, are the rates of change in amounts or concentrations of either products or reactants. Concentration of solutions, surface area, catalysts, temperature and the nature of reactants are all factors that can influence a rate of reaction. Increasing the concentration of a solution allows the rate of reaction to increase because highly concentrated solutions have more molecules and as a result the molecules collide faster. Surface area also affects a
...r 15minutes. I would keep the method the same as I did doing this investigation but try a salt solution instead of sucrose as it would be easier to make different concentrations by having a certain amount of salt per 100cm³ of distilled water.
Take a pot filled with the 200ml of water and set it on the stove until it starts to boil.