The average equivalent mass for the acid is 135g/mol H+. 3. The answer obtained in Question #2 is the equivalent mass of the acid rather than the molar mass because the acid could be polyprotic, which would mean the equivalent mass is different from the molar mass since it is depending on moles of H+ per molecule, and there could be multiple moles of H+ ions in one mole of a molecule. 4. The KHP and the acid samples must be dried, because there would still be extra water which would skew the molarity.
Another factor that can affect the chemical reaction is temperature. It can affect the enzymes by changing their speed and at a certain temperature denaturing them.When enzymes and substrates are moving quickly, they are more likely to collide and have a chemical reaction. The warmer the temperature the faster the chemical reaction is to a certain degree. The chemical reaction was the most effective at 40 because the enzymes and substrates were moving fast, but the temperature was not high enough to denature the enzyme. After 40 degrees, the temperature increase became harmful to the chemical reaction.
Rate of Reaction Lab Aim: To conduct a lab that investigates how different concentrations of hydrochloric acid (HCL) have an effect on the rate of reaction when mixed with Calcium Carbonate Chips (CaCO3) to produce carbon dioxide (CO2). Hypothesis: The higher the concentration of hydrochloric acid, the less time it will take for the reaction to occur. This links back to the collision theory which states that if a system has more collisions, there will be a greater number of molecules bouncing into each other. I believe that an acid with higher molar volume has a better chance of reacting faster than that of a weaker acid with a smaller molar volume because the higher the molar concentration of the HCL, the more molecules the acid will have
A source of error may have been the time of titration of the 5ml of Na2S2O3. As once KI is added to copper(II) sulfate, free iodine formed as seen in reaction 1. As iodine is highly volatile the amount of it escaping from the solution will increase as the addition of Na2S2O3 prolongs. To eliminate this error the conical flask should be covered or alternatively the titration of 5ml of Na2S2O3 should be done faster to lower the concentration of iodine in the solution, preventing it from escaping the solution as quickly. After 5ml of Na2S2O3 was added the solution was observed to be a less intense brownish yellow colour.
These values are in Appendix A. Bubbles from cavitation occur when suction pressure was raised higher than the vapor pressure. Cavitation causes harm to a system as it “reduces the pump capacity and causes severe erosion” . Cavitation can be prevented by the vapor pressure being exceeded by the inlet pump pressure, or the NPSH . A cavitation experiment was performed to determine the NPSH at a pump speed of 3000-rpm, using the pressure drop and flow rate.
 studied about Faradaic reaction in CDI process which they found that there was a possibility of pH fluctuations and H2O2 generation in sample solution. pH fluctuations are considered as important issue since it could affect the water quality and might lead to carbonate scaling which could harm the pipes or the system itself. The severity of issue is increasing related to operating potential in CDI system. A decrease of pH was recorded when the 1.2 V and 1.5 V (High potential) were charged in the system, implying that porous carbon oxidation may have occurred. The reaction of Carbon electrode oxidation can be viewed in Equation 3.
Evaporation of perspiration depends on the pressure gradient that exists between the skin surface temperature and the temperature of the surrounding air. For this reason, humidity of air has an impact on thermal comfort. ISO 7730 states that 30-70% of indoor humidity in which an acceptable comfort is
The increase or decrease in temperature will cause and increase or decrease in kinetic energy in the reactant particles respectively. The amount of effective collisions will increase or decrease in regard to the increase or decrease in the ￼￼￼Page 4 of 7 ￼￼￼￼￼￼￼￼￼￼kinetic energy. As such, this would affect the rate of reaction which should only be affected by the change in concentration of HCl. ￼￼￼￼Mass of powdered CaCO3 used is kept at 10 grams ￼￼￼￼To measure the weight of the CaCO3, an electronic mass balance will be used to ensure that the powdered CaCO3 weighs 10 grams before adding it into the HCl. This is to ensure that the rate of reaction will not be affected by the varying amounts of CaCO3 used but instead will be affected by the changing the concentration of HCl used.
From equation 2 I2 + 2NaS2O3 →Na 2S 2O 6 + 2NaI 2 (“IFRA Analytical Method: Determination of the Peroxide Value”, 2011) 2) The method is timeaconsuming, labor intensive, require largeaamounts of sample and generates a significant amount of waste. There is 2 major problem in the laboratory session. The firstamain limitation is that iodine can be absorbed ataunsaturated bonds in the lipid material and therefore this couldalower the Peroxide value. Secondly, iodine can be liberated fromapotassium iodide by oxygenapresent in the sample this can increase peroxide value. Uneven reactivity among different peroxides, variation in weight of sample, variations in reactionaconditions such as timeaand temperature are also possible sources of error in the iodometric titration method.
What will be the effects of varying temperatures of hydrogen peroxide on the speed of the chemical reaction that occurs by the catalase enzyme within hydrogen peroxide? If the temperature of the hydrogen peroxide is increased to 40° or more the catalase enzymes reaction speed (time it will take for the filter paper to float to the hydrogen peroxides surface in the test tube) will drastically decrease and ultimately the enzyme will become less effective. Independent. The temperature of the hydrogen peroxide. Dependent.