It means that as the temperature increases , the activation energy is lower thus the rate of reaction increase. So the substrate can bind to enzyme easily. After the optimum temperature , the weak bonds holding the enzyme will break thus deactivating the active site. Changes in temperature may not only affect the shape of an enzyme but it may also change
Conclusion Observing the graph above, I can conclude that the higher the concentration of hydrochloric acid (in molars) the faster the rate of reaction it has with calcium carbonate. I can see this because on my graph the higher the concentration the higher the line goes on the graph. An example, 1.0 molar concentration is above 0.5 molar but it is below 2.0 molar at the 60-second line. Therefore it has a faster rate of reaction then 0.5 molar but a slower rate of reaction that 1.5 molar. The results were what I expected although some anomalies did occur and are highlighted (outliers) in the tables and on graphs, however these did not affect any of the results and were probably only misreading as there were never more than one for the same
A stock solution of 6M HCl was added to deionized water in a graduated cylinder in order to dilute it down to 2MHCl. 2MNaOH was added to deionized water to be utilized later. An exothermic reaction occurred due to the fact that diluting the solutions produced heat. LabQuest was used to record data and to put it on a graph. The duration was set to 180 seconds, and the rate was at 15 seconds/sample.
3.1 Preliminary optimization studies 3.1.1. Effect of reaction time: Figure.3 represents the time progression for the enzymatic esterification of ethanol and hexanoic acid with 1:1 substrate ratio by Novozyme 435 (2 %) at 50 ˚C. It was observed that percentage conversion of ethyl hexanoate reached up to 73.6% in the initial 120 min. However, as the reaction proceeds further, a marginal change in conversion was observed after 120 min because of equilibrium of the reaction. This is attributed to the reversible nature of the esterification reaction.
Tables 4 & 5 and Figs 8 & 9). The values of kobs. increase with increasing the concentration of the added surfactant (CTAB or SDS) at a constant [H+]. Moreover, the values of mG (change in the activation barrier) for the studied complexes on transported from aqueous solution into aqueous solution containing different [surfactant] is calculated (Figs. 10 & 11) from reaction rates in the appropriate media, using the
If 2 particles collide with enough energy the will be a chemical reaction and a product will be formed, this is known as the collision theory. High concentrations imply that more reacting molecules are at high proximity to each other therefore intermolecular collisions are frequent therefore forming products frequently. To measure, the effect of each of above factors, one has to hold some factors constant during rate reaction experimentation. Therefore, this study intends to investigate the effect of concentration and surface area of reactants on the rate of chemical reactions. I am doing this experiment to gain the knowledge of the effects of concentration levels on the rate of reaction.
Research Question: How does the concentration of the nitric acid affect the the time for the magnesium to dissolve or react. Hypothesis: If the concentration of the nitric acid is lower, the magnesium strips will dissolve slower and each time the concentration acid is higher the magnesium strip will dissolve faster. The reason for magnesium strips to dissolve faster when the concentration of the nitric acid is higher is because the reaction of this experiment is exothermic and when more energy is given out the faster the magnesium strips will dissolve. Collision theory is when different reactions collide at different rates, a slow reaction have a low rate of reaction and a fast reaction have a high rate of reaction. The reason for magnesium to dissolve slower with lower Nitric acid Mols is that lower Mols of a nitric acid contains lower energy and when the magnesium collide with a nitric acid that contains a low level of energy, it does not create a reaction.
As the base, NaOH, is added drop by drop the pH gradually increases until the equivalence point. This is when the amount of hydroxide ions (from base) added equals to the amount of hydrogen ions (from acid) present in the solution. At this point the pH increases very rapidly until it reaches a more gradual rate of
e.g isocitrate dehydrogenase enzyme acts on isocitrate by oxidation followed by decarboylation Isocitrate is converting into alpha-ketoglutarate with the help of isocitrate dehydrogenase. FACTORS AFFECTING THE RATE OF ENZYME ACTION 1.Effect of nzyme concentration The rate of enzyme is directly propotional to the concentration of enzyme provided that the condition of the reaction remains constant and sufficient substrate is supplied. 2. Effect of substrate concentration The rateof reaction increases as the substrate concentration incteases until a certain point (Vmax) at which the reaction attains maximal velocity. Any Increase in substrate concentration after this point cause further increase in the rate of reaction because at Vmax enzyme moleclues are completed saturated with substrate molecules.
Concentration of acid and reaction time Aim In this experiment, I’m going to find out the relationship between concentration (mole) of acid and carbonate’s reaction. Hypothesis If the concentration of acid is stronger, then the film canister will pop (react) faster. Because the concentration of Sodium carbonate is always same in my experiment, so the factor that changes the volume of carbon dioxide is concentration of Hydrochloric acid. If the concentration gets bigger, the proportion of acid gets bigger, which means there are more particles (molecule) that will bond with other particles (molecule). For this experiment, the proportion to get a CO2 is 2HCl+Na2CO3 = CO2.., which is 2+ Na2CO3 : 1.