Titration

Ali Youssef CHM 111-0A7L Mitra Jahangeri Paper Chromatography Lab Discussion The results of the Paper Chromatography process seem to have aligned with what was expected. When the capillary action on the paper had completed and the chromatograph was finished, the distance that each cation moved (D), as well as the distance that the solvent moved (L), could be properly measured. The distance that the solvent moved ended up being 7.05cm, a number that would represent the constant variable L in…

1. 6 cleaned and dried conical flasks were collected and safely transported to the experimental table. 2. A black marker was used to mark a black cross on a white sheet of paper. This was to help with measuring the time (dependent variable). 3. A thermometer was placed on the table to measure the room temperature. 4. 0.15mol/L sodium thiosulphate solution (Na2S2O3) and 3mol/L hydrochloric acid (HCL) were poured into two separate 50 ml beakers, and the two beakers were transported to the…

Introduction Density measures the volume that a given amount of mass takes up. Usually, density has grams per unit volume as a unit. To find the density of an object, the object has to be measured and its mass has to be divided by its volume. Often times, density is used to identify substances, since different elements have specific densities. This experiment is made up of two sections; the first section measures the density of water and the density of an unknown substance. If the procedure is…

In the foregoing paper, the author reported that ethyl ester of highly unsaturated fatty acid freshly obtained from cuttle fish oil showed quite the same good nutritive effect as oleic acid ester for rat, while the acid exposed to air was proved to be extremely toxic. Since it seems to be most plausible that the toxicity is concerned with the formation of peroxide by autoxidation of unsaturated fatty acid, the author determined the amount of peroxide. The result proved. this was just the case,…

In this lab there was 2 objectives which where to recognize when a chemical reaction has occurred and practice collecting detailed observations in the laboratory using proper scientific terms. Reaction set #1 (1a) place approximately 1 ml of 0.1 M Pb (No3)2 solution into a test tube. Then sequentially add drops of 0.25M k2CRO4 solution until you see evidence of a chemical reaction. The products of this reaction are aqueous KNO3 and solid PbCrO4. (1b) place approximately I ml of .1M Pb (NO3)2…

Materials and Procedure The materials that were used were the following: 4.268 grams of zinc sulfate heptahydrate, 2.586 grams of calcium acetate monohydrate, Analytical balance, 220 milliliters of deionized water, stir stick, two 100 milliliter glass beakers, one 250 milliliter glass beaker, filter paper, ring stand, glass funnel, and an Erlenmeyer flask. All of the materials listed above were obtained or taken into consideration before experimentation began. A piece of weight paper was…

Discussion The findings in this lab show that the melting point of Alum is 92.5 degrees Celsius. During the first trial a temperature of 91.0 degrees Celsius was recorded, but during the second trial a temperature of 93.0 degrees Celsius was found. Averaging the two temperatures gives a total around 92.0. The literature melting point of Alum is said to be 92.5 degrees Celsius and the data from similar studies, such as, Chemistry 103: Synthesis of Alum, together show that the results from the…

In the volume lab, we found that the large graduated cylinder was the most accurate because it had less percent error when measuring the density of water over all of the other measuring tools.In this lab, we measured water from pipettes including volumetric and graduated pipettes, graduated cylinders, erlenmeyer flasks, and beakers to figure out the mass and density. These measurements were then used to calculate the percent error. We completed these measurements by measuring the volume of the…

Purpose: The purpose of this lab is to establish a concrete understanding of limiting reagents and percent yields. In addition, the lab should give the administrator the ability to analyze the effects of reactants on the product of a chemical reaction. Procedure: In part A of the lab, the first step in the procedure is to add 20 mL, and 25 mL of CaCl2 to two different flasks. Following this, the administrator is to add 10 mL of Na2CO3 to the flask containing 20 mL of CaCl2, and 5 mL of the…

Introduction: Leaf Disk float in water alone. When a solution consisting of a small amount of sodium bicarbonate is added to the water it causes the leaf disk to sink. As photosynthesis continues in the leaf disk it releases oxygen and causes the leaf disk to rise. While cellular respiration is occurring also the rate that the disk raise is an in implicit measurement of the net rate of photosynthesis. The independent variable in this lab is the solution and the light because it can be…