Purpose The purpose of this lab is to attempt to verify two of the three important chemical laws, The law of conservation of mass, The law of definite proportions, and the law of multiple proportions. The laws are verified through observation of the reaction between iodine and zinc. This lab also helps to hone laboratory and massing skills. this lab includes both qualitative observation and quantitative gravimetric data. Background Questions 1. For each of the three important chemical laws
(Effects of Groundwater Contamination) I started by labeling eight beakers with the numbers 1 through 8. Beakers 1 through 4 were filled with 100 mL of water, then observations of the waters were recorded. Then in beaker 2 I mixed 10 mL of vegetable oil into the water, in beaker 3 I mixed 10 mL of vinegar into the water, and in beaker 4 I mixed 10 mL of laundry detergent into the water. Then I recorded my observations of beakers 2-4 on my lab reporting form. With four small pieces of cheesecloth each folded
undergo a combustion reaction. Materials 250 mL beaker Cobalt chloride paper scissors 250 mL Erlenmeyer flask Aluminum Paper 10 mL graduate 2 glass squares safety goggles test tube tongs toothpick beaker tongs string Method The lab performance overall was good. Performing many experiments, with my lab partners, to observe and interpret the
Then, it is cleaned with steel wool. The copper wire wrapped around a pencil. • About 100 ml of cold faucet water is placed into a 250 ml flask. • 50 ml of concentrated nitric acid is measured with graduated cylinder and then 20 ml of it is transferred into an 80 ml test tube. • The test tube is then placed carefully in the 250 ml flask. It was made sure that the cold water in the flask covers about 2 cm of the bottom of the test tube. • The coiled copper
This lab examined the effects of diffusion, specifically osmosis, in dialysis tubing model cells of different solute concentrations. In turn, this lab provides a model for what happens in living cells when osmosis occurs. For the lab three beakers were filled three quarters full with solution. One beaker contained water and the other two contained a water and sugar syrup solution. Three dialysis tubes were then filled with solution and placed into the beakers to create "model cells." The beaker
I. Introduction The main objective for Chemistry 1212K laboratory is to familiarize students with basic yet critical techniques needed to further pursue a career in the science field. The goal for Chemistry 1212K lab was to determine the unknown formula of a synthesized cobalt-ammonia-halide product through a combination of experiments. The only way to calculate the particular chemical relationship was through finding the percent Cobalt, percent ammonia, and percent halide (either Cl- or Br-) and
Name- Aashish Upadhyay Integrated science II Mr. Montbriand Lab Report: Separating Mixture Purpose: The purpose of this experiment is to separate mixture of sand, Iron filings, and salt. Also, to ascertain mass of each object after separating them. Background information:- Materials get separated according to the differences they have in their physical properties. In separating mixtures you should avoid any chemical change so, you will not lost any of your product and the experiment will
Tiso Lab Partners: Laura Wilson & Brady Hill ABSTRACT The purpose of this experiment was to determine which antacid, Rite Aid Max or Alka-Seltzer Original, was the most effective in neutralizing excess hydrochloric acid (HCl) in the stomach. To begin, 10 mL of Rite Aid Max and 1 tablet (2.9g) of Alka-Selzer were added to separate 250 mL Erlenmeyer flasks, each containing a mixture of 75 mL of distilled water, 3 drops of the pH indicator phenolphthalein, and 25 mL of HCl
filling a large beaker half way with ice and then water where it is just covering the ice. Now, put 75 mL of distilled water into a small Erlenmeyer flask and place that into the ice bath. This will cool the water so it will not dissolve your aspirin when you quantitatively transfer it from the Erlenmeyer flask to the Buchner filter. Weigh out approximately 2.5+ or – 0.25 grams of salicylic acid into a 125 mL Erlenmeyer flask. Take your Erlenmeyer flask to the hood and measure out 5 mL of acetic anhydride
Leticia Glass Introduction to Chemistry Lab 5 Pre-lab Questions 1. In terms of food, what is a calorie? In terms of food, calories are the measurements of how much energy that particular food contains. 2. A piece of chocolate chunk cookie was tested the same way as is used in this procedure. The cookie sample had a mass of 0.851 g and the temperature of a 100.0 mL of water increased by 7.87 ⁰C. How many Calories per gram did the cookie contain? Show all calculations. First of all, the mass