The purpose of this experiment is to determine the pH of known substances by use of a pH color indicator of red cabbage and the use of a pH meter. As well as, to observe the pH changes in a substance by adding in more basic of acidic to buffered solutions and unbuffered solutions. This experiment will also will show how to calculate H3O+, OH- and pH by use of known values. In order to do this lab, there are a few key components one needs to know and understand first.…
1. Make sure you have all of your materials ready and labelled to limit confusion and cross contamination (recommended: have separate pipettes for each respecting substance) 2. Blend your calf liver and divide the puree into 3 different separate cups measured 2g each – add 3 drops of water to each cup as well 3. In cup labelled “NaOH” add 6 drops of sodium hydroxide onto calf liver with the pipettes, then add 2ml of H2O2 (hydrogen peroxide) soon after – watch and record results in observation table 4.…
In the correct tubes were distributed with pipettes 2ml of water, 2ml of fresh pineapple juice for the one labeled cold, and 2ml of fresh pineapple juice for the one labeled hot. The one that was labeled hot had been placed in to a hot water on the burners for five minutes. After it was taken off 3ml of warm gelatin was added to each of the test tubes and then those test tubes were placed into the ice chest until the solution with water and gelatin began to solidify. Then they were taken out and observed.…
Materials Starch Glucose Water Dialysis Tubing Iodine String Scapula Scale Benedict 's Solution Test Tubes Test Tube Rack Hot Plate Procedure Lab was demonstrated by teacher. Observations Observation of Physical Properties After Time and Heat Initial Observations Observations After 24 hours Observations…
Rate of Respiration from Refrigerated, Sprouted Mung Beans; Room Temperature Sprouted Mung Beans, and Moss at Room Temperature, and Yeast? Introduction: The purpose of this experiment was to determine the rates of respiration within refrigerated and non-refrigerated Mung beans. Cellular respiration is the oxidation of glucose molecules (C6H12O6) to produce ATP, CO2, and H2O.…
Cellular Death: Tonicity on Potato Cells Introduction The purpose of this experiment was to test the effects of tonicity on potato cells. During this experiment slices of a potato were placed into beakers containing salt solutions with different concentrations. How will the percentage of salt concentration in solution affect a plant cells water content? This experiment will determine which salt solution concentrate will cause the potato cells to absorb water or lose water.…
Obtain a piece of paper that is approximately 5cm x 10cm, and tear it into small fragments. Place the pieces of paper on a watch glass, and light the paper with a match. Observe and record reactions. Deposit a microspatula of NaCL (sodium chloride) into a test tube, and dilute the substance by infiltrating approximately an inch of water to the test tube. Let the NaCL dissolve into the water by shaking the test tube with one’s thumb over the opening of the test tube.…
In this experiement, my lab partners and I cut six uniform cylinders of beet tissues using a cork borer with a 5-mm inside diameter. (Lab Manual) We then trimmed each cylinder to exactly 15 mm in length. Before placing the cylinders of beet tissues in a beaker we rised them with tap water for 2 mins and discarded the colored water. This step is important because it washed away any Betacyanin from the injured cells on the surface.…
5 drops of bromothymol blue indicator was added to each tube. Drops of sodium hydroxide solution was added dropwise to both test tubes and gently mixed until the solutions turned blue. The observations were recorded. The tubes were set to incubate at room temperature for 20 minutes and checked at 5 minute intervals to record the observations.…
Quantification of Iron in Whole Grain Cereal Jacob Rickman and Yasmeen Coan Submitted to: Curt Zanelotti CHEM 1045, Experiment No. 12, April 15, 2016 LABORATORY WRITTEN REPORT Honor Code Signature: _________________ Objective In this experiment, we gained an understanding of the relationship between chemistry and food products while developing and enhancing good lab techniques. We applied dilution concepts to carry out the experiment.…
Depending on the temperature of water each raisin was placed in also affected the raisins texture as well as its weight. Raisins placed in room temp water had a normal texture of a raisin, raisins placed in hot water had the texture of mush, and raisin placed in cold water had the texture of hard. Our data showed that the rate of osmosis occurred more rapidly in raisins placed in hot water than the other 2 water temperatures. It then occurred a little slower in raisins placed in cold water but osmosis appeared to occur slowest in raisin placed in room temperature water.…
Organisms have been genetically modified for thousands for years. Dogs are bred together to make a new, better breeds. Fruits are crossbred to make new types of fruits. Today, most food is genetically modified. Over 70% of processed food in the United States is considered genetically modified.…
Experiment 1: Standardisation of approximately 0.25 M Hydrochloric Acid Abstract The aim of the study was to standardise a solution of hydrochloric acid with an approximate concentration of 2.5 M against sodium carbonate solution. The main steps of this experiment were preparing the sodium carbonate solution, transferring the solution into a conical flask by using a pipette, adding the bromophenol blue indicator and titrating with hydrochloric acid until the first green colour appeared. The concentration of hydrochloric acid was found to be 0.2508 mol L-1. Introduction Standardisation is a process which is carried out to determine the actual molarity of a solution.…
Introductions: The purpose of this experiment is to synthesize acetaminophen and esters in order to apply the process of retrosynthetic analysis to determine the unknown alcohols used to produce the esters. Acetaminophen, a popular active ingredient in many over-the-counter drugs, is used as a pain reliever and a fever reducer. It is synthesized from the reaction between a carboxylic acid and an amine; thus, acetaminophen contains hydroxyl and amide functional groups.1 C6H7NO + C4H6O3 C8H9NO2 + C2H4O2 This reaction is commonly known as a condensation reaction.…
The final temperature of the water was then recorded. This process was repeated using 1.03 g and 2.07 g of sodium sulphate decahydrate, and 1.01 g, 1.50 g and 2.02 g of anhydrous sodium…