Kinetics Lab Essay Example for Free

Kinetics Lab testHow does the hero sandwich concentration of hydrochloric superman affect the order of twinge in a hired gun let go reply?The aim of this experiment is to record how the change in molar concentration of hydrochloric acid affects the invest of the reaction. The following reaction will be testedNa2CO3 10H2O + 2HCl 2NaCl + CO2 + 11H2OTo measure the enumerate of the reaction an venturer GLX with a pressure sensor will be used. The pressure will be measured all(prenominal) second for 90 seconds. HypothesisI believe that if the molar concentration of the hydrochloric acid is increased, than the rate of the pressure will also increase. This is due to the fact that first of all, the reaction is a gas releasing reaction, and thus to a greater extent pressure will be built up in the flask. Also the more surd whiz of the reactants is the more particles there will be, resulting in more collisions between the particles. varyingsType of VariableVariableRange of Values/Method of ControlIndependent VariableConcentration of Hydrochloric Acid0.50 molar, 0.75 molar, 1.0 molar drug-addicted VariableRate of kPaExplorer GLX records ein truth secondControlledMass of Sodium Carbonate-Deca-Hydrate0.50 gramsTemperature of reactionAll reactions overstep at 22C (room temperature)Total Time of Reaction90 seconds in all runnings record book of Hydrochloric Acid15cm3 in all trialsMaterials* 250ml flask* 1- repair stopper with gas collection tubing* 4.5 grams of sodium carbonate-deca-hydrate0.5 for from from each one one trial ( 0.005g)* Explorer GLX with pressure sensor (1.75kPa)* Laptop with Data Studio* Stop watch ( 0.005s)* 135ml of hydrochloric acid45ml of each concentration (1ml)* BalancePictureMethodThere will be three trials for each of the three different concentrations of hydrochloric acid. Using 9 weighing boats and the balance split the sodium carbonate-deca-hydrate into 9 rafts of 0.50g.1) First, set up the data studio and GLX explorer on the laptop. Once the pressure sensor is plugged in the GLX a blank graph should tape up. Under setup in data studio, change the rate of measurement to every 1 second.2) Pour 15ml of 0.5molar hydrochloric acid into the 250ml flask.3) Click the play button on the GLX explorer to start the measurements, and immediately drop the 0.50 grams of sodium carbonate-deca-hydrate into the hydrochloric acid right later cover the flask with the one hole stopper.4) There should be a stop watch on the data studio software, and after 90 seconds stop the measurements by pressing play on the GLX explorer.5) Save the file as 0.5molar trial 1.6) Clean out the flask and repeat steps 1 finished 5 two more times, for trials 2 and 3.7) After three trials are recorded and saved for 0.5molar hydrochloric acid. Repeat these steps for 0.75molar and 1molar hydrochloric acid.boilersuit, you will obligate a total of 9 different graphs on data studio. These graphs will later be taken by applying a suntan line to the beginning of each graph. This tangent line will show the rate of the reaction (sufficient relevant data).ResultsThe graphs from the GLX explorer are shown in the appendix at the end of the testing ground roport. A tangent line (slope line) was used on the beginning of the graphs to get the rate of the reaction. The slope of the tangent line would be the rate of the reaction at the point where the tangent line meets the curve.Table 1 The Rate of the Reaction Concerning the Concentration of the Hydrochloric AcidConcentration (moles) 0.01mQualitative Results* The reaction released a lot of gas. I noticed this because at first the reaction was being done in a test tube and then the one-hole stopper popped off in the middle of the reaction, resulting in a switch to use a flask.* When the molarity of the hydrochloric acid was higher, there was a much louder fizzing noise, indicating a faster reaction.* For some cases no all the sodium carbonate-deca-hydrate reacted fully.* N ot all the sodium carbonate-deca-hydrate which was added to the hydrochloric acid was crushed to mill.GraphCalculations portion dubiousnessConcentration(0.01/0.50) x 100% = 2.0%(0.01/0.75) x 100% = 1.3%(0.01/1.00) x 100% = 1.0%Average Rate of Reaction(0.05/1.00) x 100% = 5.0%(0.05/1.30) x 100% = 3.8%(0.05/2.30) x 100% = 2.2%Total Percentage Uncertainty 15.3%Percentage ErrorUsing sodium carbonate deca hydrate was a limit point to this experiment beacsue this made it extreamly hard-fought to calculate the theoretical value of the reaction. Therefore, one cannot tell weather the lab had a systematic erroneous belief and a random error.ConclusionOverall, the hypothesis held correct. Clearly shown from the results, the rate of the reaction was much faster when the molar concentration of the reaction was greater. The rate of the reaction was measured using a pressure sensor, and as the rate of the pressure would indicate the rate of the reaction. For the one molar concentration of hy drochloric acid the rate of the reaction was intimately twice as fast as the half molar concentration. This can clearly be explained through kinetics. The more concentrated one of the reactants is the more particles there will be. Therefore, when there are more particles more collisions will occur and with more collisions the chances of the collisions being greater than the activation energy will also increase. Overall this increases the rate of the reaction.EvaluationOverall, this experiment went very well however, there were numerous limitations which affected the results. One very clear and important limitation is the fact that not all the sodium carbonate-deca-hydrate was powder. During the experiment, 0.50 grams of sodium carbonate-deca-hydrate was collected for each trial of the experiment. However, not all the sodium carbonate-deca-hydrate was powder, as there were some larger pieces. This changes the surface expanse of the reactant and that would have a greater affect on t he results.For example, if one of the trials had 0.50 grams of sodium carbonate-deca-hydrate and there was a prodigious piece of that substance, than the surface area of those 0.50 grams would be less than the surface area of the trial that had all powder substance. With a larger surface area there would be fewer collisions which would make the rate of the reaction slower. Directly affecting the results, this limitation would need to be improved. A realistic improvement to this experiment would be to simply use a bowl and crush all the sodium carbonate-deca-hydrate to powder. Therefore, there would be no big pieces and the surface area would be relatively the same in each trial.Another limitation to this experiment would be the fact that the sodium carbonate-deca-hydrate was poured into the test tube right before the one hole stopper was rigid on the test tube. Therefore, there was a small time frame where gas was lost. This would affect the pressure in the test tube. One simple w ay to improve this limitation would be to use a special test tube. with this special test tube there should be a small hole on the side where another tube comes out and that is where the sodium carbonate-deca-hydrate would be placed in. Therefore, there would be minimal or no gas escaping and the results would not be affected by a drop in pressure.