Determination of % Composition of Pennies Using Redox and Double Displacement (Precipitation) Reactions Introduction: Oxidation involves the gain of electrons of hydrogen or the loss of oxygen or decrease in oxidation state. If zinc completely reacts with HCL‚ then the theoretical yield of copper should be equivalent to the actual yield. Purpose: In this lab‚ we will determine the percent composition of a modern (post-1982) penny by using a strong acid to react and dissolve the zinc
Premium Chemistry Concentration Chemical reaction
Linn Bailey once said‚ “If you have discipline‚ drive and determination nothing is impossible.” If you put your mind to anything‚ and have confidence you can accomplish things. When you let the hard times get to you it will bring your confidence down. Determination will help you get through the hard times even if you don’t think you can overcome them. In the book No Safe Place‚ the author uses conflict to develop the theme; Determination is key‚ even if you are doing it all by yourself. For example
Premium Adolescence English-language films Young adult
Spectrophotometric Methods: The Determination of Iron The goal of this laboratory experiment was the quantitative spectrophotometric determination of Fe (II) by using a calibration plot‚ which obeyed the Beer-Lambert Law. In order to determine the Fe (II) concentration‚ a series of solutions of known concentrations were made. The solutions were analyzed by the Ocean Optics spectrophotometer in order to determine their absorbance. The concentration of the unknown Fe (II) was determined by the “eye-ball”
Premium Concentration Chemistry
Case Study Analysis Case 11-4 Functional Currency Determination — IFRS 2009: Sparkle Company is a Nigerian diamond mining company. (Nigerian currency is the Naira (NGN).) Sparkle is a joint venture‚ 50 percent owned by Shine and 50 percent owned by Brighten. Both Shine and Brighten are U.S.-based companies with US$ functional currency. This year‚ Sparkle had several transactions with its joint venture owners and outside parties. The details of Sparkle’s transactions are as follows: Loans
Premium Revenue Generally Accepted Accounting Principles Copyright
Checkpoint Patient Self-Determination Act In 1990‚ The Patient Self-Determination Act began. This Act would require that healthcare facilities inform patients about their right in case of an emergency situation. Also the patient would be informed about their rights to get advanced healthcare accommodations‚ and any related information that pertains to the legal impact and state laws regarding all healthcare decisions. Many of the healthcare facilities that exist today in America would
Premium Health care proxy Medical ethics Health care
Spectrophotometric Determination of an Equilibrium Constant. Abstract: The report presents determination of equilibrium constant for the formation of a complex ion FeSCN2+. This was accomplished using a colorimeter to measure absorbance of some known concentration solutions in order to generate the calibration curve. The equation of the graph was used to compute the equilibrium concentrations of the reactants and products‚ needed to calculate the equilibrium constant for the reaction.
Premium Chemical equilibrium
SEX DETERMINATION IN FORENSIC ODONTOLOGY Identification of living beings and dead bodies is of great importance in Forensic science. Sex determination is one of the important steps in establishing identity. Sex identification in international sports: In 1932 Helen Stephens and Stella Walsh: Hitler’s Olympics In 1936 Stella accused Stephens of being male and so a crude physical examination including gross physical examination of external genitalia was done. In 1966 gender identification became
Premium Chromosome Y chromosome Gender
CP4001: ANALYTICAL & PHYSICAL CHEMISTRY | | Formal Report of the Quantitative Determination of Sulphate by Gravimetric Analysis (Experiment 4) | Maryjo Lee Wei Min 1111107 DBS/FT/1A/01 | (A) Synopsis The amount of sulphate is determined quantitatively as barium sulphate by gravimetric analysis. This determination consists of slowly adding a dilute solution of barium chloride to a hot‚ unknown sulphate solution which is slightly acidified with concentrated hydrochloric acid. A white
Premium Solubility Chemistry Hydrochloric acid
Experiment A Spectroscopic determination of Iron with Phenanthroline Unknown # 2 Mass of Mohr’s Salt: 0.2040 1. 5mL of 6M acetic acid was measured and transferred into a 100mL volumetric flask with a pipette and diluted to the mark. Concentration = [0.2040(±0.0001)g/100(±0.08)mL]*[(1mol/392.16g)/(1L/1000mL)] = 0.005202(±0.09382%) = 0.005202(±0.000005)mol/L 2. 10mL of the above stock solution was transferred to a 250 mL volumetric flask and diluted to the mark. Concentration
Premium Chemistry Spectroscopy Absorption spectroscopy
CHEMISTRY DETERMINATION OF ENTHALPY CHANGE OF NEUTRALIZATION IA Criteria Assessed: DCP CE MS Introduction When an alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions (H+(aq)) from the acid react with the hydroxide ions (OH- (aq)) from alkali‚ forming water. The identity of salt will depend on the nature of the acid and alkali used. H+(aq) + OH- (aq) → H2O(L) The combination of H+ and OH- ions in this way releases energy. In this practical‚ the
Premium Sodium hydroxide Enthalpy