Method Step 1 – Remove blazer and put goggles on for health and safety reasons. Step 2 – Collect the following equipment – Thermometer – to check the temperate Conical flask – to hold acid 1 litre breaker – contain water Measuring cylinders x2 50ml 25ml Blanco – to weight out the marble chips Marble chips CaCO3 – which react with Hydrochloric acid Stopwatch – to time when the reaction starts Delivery tube – to pass the air Camp stand – to hold the equipment Boson – it heats up the water Tripod – to hold the beaker at a certain height that has the most heat Ice – to cool down the water of a certain temperate Test tube holder – so you don’t burn your hand and it is safe. Step 3 – Set up all the equipment. A- Clamp Stand. B- Measuring tube (25ml) C- Delivery tube D- Conical flask E- Reaction “what’s happening” F- Thermometer G- Beaker H- Boson I- Tripod J- Water K- 1 litre beaker Step 4- My partner weighed the marble chips on the Balance, the amount we used was 1g. Step 5- I poured the Hydrochloric acid into the 50ml measuring tube, the amount we used was 40ml. Step 6- I filled the measuring tube with water and put my thumb over the top and press hard so there was no air in it. Step 7- I filled the large beaker up with water and placed it near the clamp stand. Step 8- I used the measuring tube and turned it over and put it in the beaker which has water in it then made sure there was no air trapped in the measuring tube. Step 9- Make sure the delivery tube is fitted so the air that been created by the marble goes in the tube and not in the air. ... ... middle of paper ... ...eriment I could improve many things like changing the marble size, time and heat. The marble we used in the start of the experiment was too large which mean the rate of reaction was dropped really low, to overcome this problem we made sure we had small marble so that the experiment can be relievable and have a good set it result. Another problem where found that time keeping from the experiment we were doing, the times weren’t spot on or we didn’t stop it in time, or too early. You can see from the table at 35 the average time did not match the time on after and before temperature the reason could be we didn’t check the temperature correctly or maybe we had large rocks that the surface are is too little or we did not read the time correctly or we didn’t stop it in time, to overcome this problem we be to double check the time and take extra care with timing.
Each subsequent trial will use one gram more. 2.Put baking soda into reaction vessel. 3.Measure 40 mL vinegar. 4.Completely fill 1000 mL graduated cylinder with water.
the replicate shows the same trend as the first experiment. I used a measuring cylinder and a beaker to measure out the amounts of water; however these did not seem to affect the quality of my results. To increase the accuracy of my results I could have perhaps used a burette. Even though I did the best I could to keep the experiment accurate, I did. some places there were mistakes that unintentionally occurred.
3. Next, I label each test tube with the temperature to be investigated and then added 2.5cm3 of Trypsin solution.
For this experiment you have to have a basic understanding of Collision Theory to understand what’s going on in the experiment. Collision Theory is a model of chemical reactions in which a reaction occurs after a collision containing enough energy occurs between two reactant molecules. This model has five factors which can be affected and they are the nature of reactants, temperature, concentrations, surface area and catalyst. If one of these were changed then the reaction could occur faster or slower depending on what was changed.
§ Pour water from the kettle into the beaker until it is half full and
4Slowly add more water to the blue glass until you can see a bulge of
Rinse your beaker thoroughly to wash any excess powder. 12. Repeat steps 7-11 3 more times for reliability. To make sure the temperature still stays hot by continue heating the water a little bit using the hot plate. 13.
middle of paper ... ... different from what it should be. To solve this problem a thermostatic water bath could be used as stated above. * If the stop watch was stopped to early or late, again the overall reading would not be as accurate as it could have been.
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.
2. In the large beaker, put water and boil it completely. After that, remove the beaker from heat. 3. Sample tubes (A-D) should be labeled and capped tightly.
Begin collecting samples with the pure hexane. Keep adding hexane so that the silica gel column does not run dry. Collect one 20 ml sample. Repeat with 90:10 hexane and collect 4 20-mL bottles. Repeat with 80:20 hexane and collect 2 20-mL samples.
Firstly, we need to keep the chemical at a constant concentration. So, in this experiment we have chosen to keep hydrochloric acid at a constant concentration (5cm3). We could have, however, used Sodium Thiosulphate as a constant, but we had chosen to use Hydrochloric acid. Next, we must make sure that the solution is kept at a constant volume throughout the experiment. If the volume is different, then it could give different results if it was at a constant volume.
5. Carefully remove the flask with 9" tongs from the water bath and add 25mL of your ice-cold water to the flask.
second test tube also add 6 mL of 0.1M HCl. Make a solution of 0.165