Purpose: The Purpose of this lab is to utilize‚ demonstrate and understand the various techniques and procedures used to gravimetric labs. For this particular lab we will utilize our scientific knowledge of related to gravimetric procedures to find the chloride content in an unknown soluble salt. Theory: Using our developed knowledge of the conservation of mass‚ solubility and precipitation it is possible (with some degree of error) to know the content of chlorine in a particular salt by dissolving
Premium Chemistry Water Solution
PERCENTAGE COMPOSITION WORKSHEET 1. Calculate the COMPLETE percentage composition (by mass) of the following: (a) iron (III) oxide (Fe = 70.0%‚ O = 30.0%) (b) barium phosphate (Ba = 68.4%‚ P = 10.3%‚ O= 21.3%) 2. What is the percentage of sodium (by mass) in sodium phosphate? (42.1%) 3. For the hydrate sodium sulfate decahydrate‚ calculate the following: (a) the percent of sodium (by mass) in the hydrate (14.3%) (b) percent of TOTAL oxygen (by mass) in
Premium Water Oxygen Magnesium
Victoria MacDonald SCH3U Zegil Due May 5th‚ 2017 Magnesium Oxide Lab Purpose: To determine the composition by mass of magnesium oxide‚ the percentage composition‚ and the percentage yield. Hypothesis: The law of definite proportions states that a chemical compound always contains the same amount of proportions of elements by mass. Based on the law of definite proportions‚ the percentage composition of magnesium oxide should be 60.3% magnesium and 39.7% oxygen. Prediction: Based on the law of
Premium Chemistry Oxygen Atom
Mustaqim Ahmed Period 4 September 18‚ 2013 Analysis of Food Dyes in Beverages Purpose: To determine the concentration of dye in a sports drink using spectroscopy and graphical analysis. We will be using beers law to find the unknown concentration of dye in a sports drink. Materials: Beakers‚ 50-mL‚ 2-3 ; Test tubes (13 x 100)mm 3-8 ; FD&C Blue 1 stock solution‚ 50-mL ; Lens tissues ; Pipets‚ serological‚ 10-mL ; Sample of consumer sports drink‚ 10-mL ; Spectrophotometer ; Test tube rack Procedure:
Premium Absorbance Laboratory glassware Coffee
Chemistry: The Central Science by Brown‚ LeMay and Bursten‚ 10th ed.‚ Pearson Education. Inc.‚ Upper Saddle River‚ NJ‚ 2006‚ ISBN: 0131464892 Includes: Text book‚ Laboratory Manual‚ Student Study Guide‚ AP Test Prep Series‚ Solutions to Practice Problems 2. Barrons AP Chemistry‚ Jespersen‚ Neil D‚ 4th ed.‚ Barron’s Educational Series‚ Inc‚ 250 Wireless Boulevard‚ Hauppauge‚ New York 11788‚ ISBN: 9780764193293 Topics and Concepts Covered Topics covered are suggested by the College Board
Premium Chemistry Ion Chemical reaction
Experiment: DNA damage and mutations in human cells when exposed to nitric oxide Aim: To examine mutations after in vitro exposure of nitric oxide to human cells. Abstract: Nitric oxide (NO) is a anatomical carrier formed by various cell types. In this experiment nitric oxide is made to react with undamaged human cells and solutions of DNA‚ RNA ‚ guanine or adenine in aerobic conditions. TK6 human lymphoblastoid cells were altered. It has been observed that deamination of purines‚ pyrimidines
Premium Nitric oxide Oxygen DNA
Chloride‚ ammonia‚ and cobalt are three examples of percent compositions determined to help narrow the selection of possible unknowns. Titrations using Na2S2O3 and HCl to determine percent cobalt and ammonia‚ respectively‚ are used. Silver nitrate is used to precipitate the chloride ions in the unknown‚ which can be measured to determine the percent composition of chloride in the unknown. The results from these three major analyses helped to draw the conclusion that the unknown is in fact [Co(NH3)6]Cl3
Premium Chlorine Sodium chloride Hydrochloric acid
Empirical and Molecular Formula | Key Concepts * Empirical Formula of a compound shows the ratio of elements present in a compound. * Molecular Formula of a compound shows how many atoms of each element are present in a molecule of the compound. * The empirical formula mass of a compound refers to the sum of the atomic masses of the elements present in the empirical formula. * The Molecular Mass (formula mass‚ formula weight or molecular weight) of a compound is a multiple of the empirical
Premium Molecule Atom Mass
Date of Experiment: 6/9/15 Report Submitted: June 10‚ 2015 Title: Observations of Chemical and Physical Changes Purpose: the purpose of this lab experiment is that I will be able to decipher the difference between a chemical and physical change. I will be about to tell whether a chemical change has occurred during the experiment or if it was a physical change and I will be able to answer why it is either one. Procedure: In the lab experiment‚ I mixed different types of chemicals
Premium Chemistry Chemical reaction Hydrochloric acid
figure out if the burnt Mg ashes weigh more than the product which is Magnesium Metal. Another objective was determining the formula of the compound that results when Magnesium and Oxygen react. Theory: The purpose of this lab was to confirm the chemical formula of magnesium oxide by comparing the masses of pure magnesium solid prior to any reaction and magnesium oxide solid after a reaction between all of the magnesium and oxygen from the air when heated from a Bunsen burner in a crucible. Using
Premium Magnesium Oxygen Mass