Measure the pH of the solution containing water, solid sodium bicarbonate as well as additional sodium bicarbonate. 29. Record results to determine if excess sodium bicarbonate increases or decreases the pH of the water. 30. If excess sodium bicarbonate increases the pH of the water, it shows that excess sodium bicarbonate increases the pH of the blood and if excess sodium bicarbonate decreases the pH of the water, it shows that excess sodium bicarbonate decreases the pH of the blood.
The goal of the experiment is to synthesize a bromohexane compound from 1-hexene and HBr(aq) under reflux conditions and use the silver nitrate and sodium iodide tests to determine if the product is a primary or secondary hydrocarbon. The heterogeneous reaction mixture contains 1-hexene, 48% HBr(aq), and tetrabutylammonium bromide and was heated to under reflux conditions. Heating under reflux means that the reaction mixture is heated at its boiling point so that the reaction can proceed at a faster rate. The attached reflux condenser allows volatile substances to return to the reaction flask so that no material is lost. Since alkenes are immiscible with concentrated HBr, tetrabutylammonium bromide is used as a phase-transfer catalyst.
Clean up and return the materials. Paragraph 3 In my bar graph I presented the relationship between the temperature of water and an Alka-Seltzer’s rate of reaction time when dropped into the water. The data proves that if the temperature of water increases, then the reaction rate of an Alka-Seltzer tablet will increase as well.
SDS-Polyacrylamide gels were prepared and the glass plates were washed with 70% ethanol and water. After drying the plates, water was used for test leakages. Two SDS-Polyacrylamide gels were prepared according to the following recipe. These all above components of the running gel were added in a 50 ml tube and solutions were mixed and pipetted into the prepared gel chambers. Glass plates were filled ¾ and the gel was covered with 100-500 µl Isopropanol in order to achieve an even surface.
Shayna Salloway AP Chemistry A Snyder 11 September 2014 Title: Finding Mole Ratios of Reactants in a Chemical Reaction Purpose: Experiment using the method of continuous variations to figure out mole ratios of reactants. Procedure: 1.
MDA level was determined by thiobarbituric acid reactive substances (TBARS) in serum, based on the reaction between MDA and TBARS. Standard Malondialdehyde solution in 5 mL of volume was processed along with test samples. 1.5 mL of 0.8% of TBA was added to 1 mL of the serum sample. Then 0.4 mL of 8.1% sodium dodecyl sulphate and 1.5 mL of acetic acid was added. The mixture was finally made upto 5 mL with distilled water and placed in hot water bath at 95ºC for 1 h. After cooling, 1 mL of distilled water and 5 mL of the mixture of n-butanol and pyridine (15:1, v/v) was added.
Placed the cuvette sample in the Sprectrovis. After each run, the temperature of each sample was collected (to nearest 0.1°C). Disposed of the sample solution, cleaned the cuvette with DIW and repeated the latter procedure using the correct volumes for each new run from Table 1.
The washings are filtered off into a 100 mL measuring flask; after cooling distilled water is added until the mark is reached (stock solution). In proportion to the expected chloride content aliquot part of this solution, which should preferably contain 50 mg – 100 mg NaCl, taken off, distilled water being added to obtain a quantity of approximately 100 mL. Subsequently 5 mL ferric alum solution, 20 mL 0.1 N AgNO3 solution and 5 mL – 10 mL ether or 1 mL nitrobenzene are added; titration is carried out by means of an ammonium thiocyanate solution 0.1 N, until the red colouring remains after
Then, putting of choloform in amount of 10 mL and solution of Hanus iodine as amount of 10 mL into conical flask is realized. Addition of these two substance into otheraflask also occurs for blank. Next, waiting for these two samples for exactly 30 minutes is realized. Afterthat, solution of potassium iodine in amount of 15 mL and 40 mL water being distilled are added. Titration of last mixture is performed in company with 0.1 M Na2S2O3 until the obtaining of color in yellow.