Lab Title: Mole-to-Mole relationships and Empirical Formulas Purpose: The objective of lab four was to use the website Late Nite Labs to determine mole-to-mole relationships and empirical formulas in chemical reactions. Combining and/or heating various compounds, observing the reactions and then calculating the moles revealed the balanced chemical reactions. Materials: For the virtual experiment, a computer, Internet, calculator and access to Late Nite Labs were needed. If one were to do the
In “Star-nosed Mole,” author Sean Zera writes an interesting article about the Star-nosed Mole. His article’s purpose is to inform readers many intriguing facts about the Star-nosed Mole. Some questions Zera answers in his article are what do they look like, where do they live, what do they eat, and even how do they communicate with each other. His article is great because he explains almost everything about the Star-nosed Mole. Another thing Zera does that strengthens his article is he has categories
mole___ = ___moles Cu Gram molar mass Cu Mass of Sulfide x ___1 mole___ = ___ moles S Gram molar mass S Emperical Ratio: __moles Cu / ___moles S : __ moles S / __moles S % Composition ~ _mass of element_ x 100 mass of compound mass : mass conversion ~ mass of Cu x _1 mole Cu_ x 1 mole compound x gram molar mass of compound = mass gram molar mass Cu gram molar mass S 1 mole of compound of compound Data: ... ... middle of paper ... ... Copper
replacement reaction between iron and copper(II) sulfate, calculate the mole ratio and find percent error. Theory: Mole relations: One mole (abbreviated mol) is equal to 6.02×10 23 molecular entities (Avogadro's number). Each element has a different molar mass depending on the weight of 6.02×10 23 of its atoms (1 mole). The total number of atoms of each element must be the same on each side of the equation to
Investigation to Determine the Relative Atomic Mass of Lithium Introduction My aim of this experiment will be to determine the R.A.M using two separate methods In the first method I will dissolve a piece of lithium of a known mass in water, I will then collect the hydrogen gas produced, which can be used to calculate the relative atomic mass of Lithium. The balanced equation of our reaction is shown below; [IMAGE]2Li + 2H2O 2LiOH + H2 In the second method I will do a titration
Born on September 23, 1953, Earl Edwin Pitts was a all-American, clean-cut citizen of the United States. Earl Edwin Pitts is a native of Urbana, Missouri, he has a Bachelors in Science Degree from Central Missouri State University, a Master's Degree from Webster College, and a law degree from the University of Missouri, Kansas City. He served in the Army from 1975 to 1980. As a law school graduate and retired Army Captain (1), Earl Edwin Pitts had dreamed of working for the Federal Bureau of Investigations
The Mole People The Mole People by Jennifer Toth was my book of choice when I first glimpsed at the title. My first thoughts about the title were homeless people living in poverty and trying to survive. Homeless people have always intrigued me when it comes to their lifestyle. How can someone live like that? When I visit New York, Philadelphia, or anywhere populated I always spot a few homeless people walking around or sitting down with a sign. When I stare at them all I feel is pity and gratitude
Molar Mass The mass in grams of 1 mole units of a substance. Denoted by g/mol. The molar mass of one mole of atoms of an element is equal to the atomic mass of the element expressed in g/mol, as said earlier, “amu” can be replaced with “g/mol”. Section III. Reaction Stoichiometry As said in the introduction, reaction stoichiometry allows us to determine the amount of substance consumed in a chemical reaction. It is also the study of the quantitative relationship of the reactants and products
Elizabeth; Smith, Stanley; Stovall, Iris. Fundamentals of Chemistry. University of Wisconsin-Madison, 2000. Web. March 17, 2014. De Leon, N. "Molar Mass (Molecular Weight)". Indiana University Northwest. Web. March 17, 2014. Department of Chemistry. "The Mole and Molar Mass". The University of Memphis, 2013. Web. March 17, 2014. Iowa State University. "Material Safety Data Sheet Copper (II) Sulfate Pentahydrate". Iowa State University, July 9, 1999. Web. March 17, 2014. Texas A&M University. "Chemistry"
A vogadro was born on June 9, 1776 in Turin, Italy. He began his career in 1796 by obtaining a doctorate in law and practicing as a lawyer for three years after. In 1800, he began to take private lessons in mathematics and physics and decided to make the natural sciences his profession. He was appointed as a demonstrator at the Academy of Turin in1806 and the Professor of Natural Philosophy at the College of Vercelli in 1809, and in 1820, he was appointed the professor of mathematical physics. He
anhydrous salt (amu) 208.2 208.2 Moles of water lost (mol) 0.008885 0.008446 Moles of anhydrous salt (mol) 0.004366 0.004150 Moles of water per mole of anhydrous salt (mol) 2.035 2.035 Average moles of water per moles of anhydrous salt (mol) 2.035 2.035 Empirical formula BaCl2●2H2O BaCl2●2H2O Sample Calculations NOTE: All data comes from Trial 1 Mass of the hydrate = Mass of crucible and hydrate - Mass of empty
carbon-12. Mole: This is the unit of an atom of substance. One mole of a substance is the mass that has the same number of particles (Molecules, Ions or Electrons) as there are atoms in exactly 12g of carbon-12 Avagadro’s Constant: This is the number of atoms or molecules in one mole of a substance. It is calculated using (L = 6.01 x 1023) I will also include the equation for number of moles and volume of gas formed. I shall use my class notes as my reference. Number of Moles of gas =
will react and produce a compound. The general form of a synthesis reaction is, A + B → AB. In order for this lab to be done successful you need knowledge on, percent composition, the empirical and molecular formula, the law of conservation of mass, moles and molar mass, qualitative and quantitative. To begin, the percent composition of a compound is the percent of the total mass that each element has in that compound. Every compound would have a certain percent composition. To calculate percent composition
Lab #4- Molar Relationships INTRODUCTION The mole is an important concept in chemistry. This unit is the measure of atoms or particles present in a compound, which is represented by Avogadro’s number, 6.022*1023. Avogadro’s number can be used in conjunction with other measures, like mass, to determine the number of particles in a compound. This allows chemists to learn more about how a compound may react or the behaviors of different chemicals. Another important concept in chemistry in the molar
Introduction: To properly complete this lab, a basic understanding of mass, moles, and empirical formula is required. Mass is a unit of measurement that is used to determine the number of grams in a certain object. A mole is a measurement in which the amount of substance that is present can be determined.To convert between from mass to moles the amount of grams present is divided by the atomic mass to find moles. To get back to mass from mols the amount of mols is multiplied by the atomic mass. An
means that it must be diluted by 10 times. This is calculated as follows: Original Acid Diluted Acid Concentration 0.3 mol dm-3 0.03 (0.075 / 0.25) mol dm-3 Volume 0.25 dm3 0.25 dm3 Num. of moles 0.075 mol dm-3 0.075 mol dm-3 N- number of moles C- concentration V- Volume
Volumetric Analysis and Accuracy Introduction: The purpose of this lab in to increase awareness of accuracy of the equipment that you are using in the laboratory as well as systematic and random errors. Through the titration of hydrochloric acid with standard anhydrous sodium carbonate the accuracy of the equipment was tested to discover the difference in concentration over the five trials conducted. Method: The method that was given in the Chemistry 306 Laboratory was followed from page 14 –
recipes. Most people my age always salivate to the idea of their grandmothers making that amazing dinner. Mostly all americans can agree on the superb taste of the mexican food, and one of my favorites and most traditional of them all is the famous “Mole sauce”. It is made on special occasions such as birthdays, christmas, new years, and teenagers first communion at the church. This complex dark red spicy/sweet sauce has a legend behind its creation. It is believed in the mexican culture that it was
method. Also known as continuous variance, Job’s method carefully used reactant mixtures such that the total moles and volumes of reactants are constant [Harris, 2010].When just enough of the metal and ligand react the most product is formed. Measuring the absorbance of each solution, the absorbance can be plotted versus a mole fraction of metal or ligand. Using the two resulting equations the mole ratio can be determined. Absorbance is measured by ultraviolet-visible spectroscopy. This method uses visible
sodium carbonate Bubbles were obtained After burning it Soot was obtained Data Processing Mass of benzoic acid 96.68 – 95.47 = 1.21 grams We assume that the reaction goes to completion which would mean that one mole of benzylalcohol should give one mole of benzoic acid. Hence, the theoretical yield is 100% by amount of mol. Molar mass Benzylalcohol 108 g/mol Benzoic acid 122 g/mol Initial amount of benzylalcohol: [IMAGE]