Synthesis Procedure 1 -1.0 Introduction A Cobalt-Amine-Halide compound is synthesized from cobalt (II) chloride hexahydrate. An orange-tinted solid is produced and is considered to be unknown since the specific ligand amounts are unknown. By determining the percent composition of various elements and compounds in the unknown‚ its true identity can be predicted. Chloride‚ ammonia‚ and cobalt are three examples of percent compositions determined to help narrow the selection of possible unknowns
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
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Table of Observations Compound Flame Color Strontium Chloride strong dark orange red Strontium Nitrate bright orange Copper II Nitrate bright green Copper II Chloride strong light green Sodium Nitrate strong orange Sodium Chloride a soft orange Potassium Nitrate soft peach Potassium Chloride peach with orange outline
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Writing Complete Equations Practice For each of the following problems‚ write complete chemical equations to describe the chemical process taking place. Important note: There are a few physical processes on this sheet – You can’t write an equation for a physical process! 1) When lithium hydroxide pellets are added to a solution of sulfuric acid (dihydrogen sulfate)‚ lithium sulfate and water are formed. 2) When dirty water is boiled for purification purposes‚ the temperature is brought up to
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interpretation with appropriate uncertainty. Conclusion & Evaluation 1. Reasonable conclusion with justification 2. Evaluation of weaknesses & limitations 3. Realistic relevant improvements Quantitative Data: Volume Hydrogen Chloride Solution with a concentration of 0.05 mol/dm3 used to neutralize Calcium Hydroxide with unknown concentration Trial: Initial Volume (v/cm3) ± 0.05 cm3 Final Volume (v/cm3)±0.05 cm3 Volume Hydrochloric Acid Used (v/cm3)±0.1 cm3 Volume
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be reacted with hydrochloric acid and the gaseous product was to be reacted with a suspended drop of barium carbonate. The presence of clouding in the droplet would also confirm the presence of carbonate anions. Silver nitrate was to be added to chloride solution and the
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Data: Mass of clean dry vial 14.95 grams Mass of clean dry vial and zinc 18.65 grams Initial buret reading of 3M HCl 1.88mL Final buret reading of 3M HCl 17.91mL After the hydrochloric acid was added to the zinc bubbles began to form as hydrogen gas was produced. By the second day‚ the bubbles had ceased forming and the zinc
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Title: Prep of t-Butyl Chloride via SN1 Reaction Purpose: The purpose of this experiment is to synthesize tert-butyl chloride via an SN1 reaction. t-Butyl Chloride was synthesized from t-Butyl Alcohol using hydrochloric acid in separatory funnel; isolation of t-Butyl Chloride was done under distillation conditions. The experiment resulted in 8.29grams of purified compound‚ which is a 66.27 percent yield. Procedure: As per handout with changes Equation: Mechanism: Results: (Scan
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Each element emits a unique color light. The purpose of this experiment was to observe these unique colors and calculate their energy. In order to observe this‚ we placed the physical elements in a 24 well plate‚ dipped wet q-tips into the wells to gather the element‚ and put it over the bunsen burner to observe the flame emitted. While observing the different flames‚ we saw that different elements did indeed emit unique flame colors. Colors such as red‚ violet‚ and turquoise were emitted. All of
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Name:_________________________________________ Section________________________ Chemistry 104 Laboratory University of Massachusetts Boston Hexamminenickel(II) Chloride Synthesis _______________________________________________________________________________ PRELAB ASSIGNMENT Calculate the percent yield for the sample data shown on page 3. Answer____________ _______________________________________________________________________________ INTRODUCTION In aqueous solution nickel ion Ni2+ is surrounded
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