density is 18.769g divided by 8 cm3 which is 2.34g/ cm3. The chunks of rock should be returned to the waste beakers after use and we should not pour them into the sinks. In the second part of the experiment‚ the chemical involved is sodium chloride which has no major health risks we should measure the density of the density of NaCl Solution. The concentration of NaCl which is assigned is 15%. We need 15g NaCl and 85 ml distilled water to make 15% NaCl solution. Firstly‚ we should make the NaCl
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List the formula for determining percent composition by mass. Objectives: 1. to separate a three component mixture and 2. determine the percent composition by mass of each component in the mixture. Materials: Ammonium chloride (NH4Cl)‚ Sodium chloride (NaCl also known as table salt)‚ and Silicon dioxide (SiO2 also known as sand) Equipment: a variety of equipment is available at the supply table Procedure: Week One‚ Day 1: Make your mixture and separate it. 1. Mass
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volume is added to a known volume of a second solution until the reaction between them is complete. The objective of this experiment is reacting sodium bicarbonate (NaHCO3) and sodium carbonate (NaCO3) with hydrochloric acid (HCl) to produce sodium chloride (NaCl)‚ water (H20) and carbon dioxide (CO2). -Use the titrations of the following chemical reactions: NaHCO3 + HCl (aq) NaCl (aq) + H2O (l) + CO2 (g) 2HCl (aq) + Na2CO3 (s) 2NaCl (aq) + H2O (l) + CO2 (g) Experimental procedure- Two Erlenmeyer
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THE INTRODUCTION TO SOAP MANUFACTURE BY W. H. SIMMONS‚ B.Sc. (Lond.)‚ F.C.S. AND H. A. APPLETON It has been said that the use of soap is a gauge of the civilisation of a nation‚ but though this may perhaps be in a great measure correct at the present day‚ the use of soap has not always been co-existent with civilisation‚ for according to Pliny (Nat. Hist.‚ xxviii.‚ 12‚ 51) soap was first introduced into Rome from Germany‚ having been discovered by the Gauls‚ who used the product obtained
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The Preparation of 1- Bromobutane Introduction... Aim : To prepare 1-Bromobutane. Background : The most common way of preparing alkyl halides‚ which are very useful intermediates in syntheses‚ is the replacement of the OH group of an alcohol by a halogen. This replacement is a nucleophilic substitution reaction‚ and alcohols do not undergo nucleophilic substitution reactions because hydroxide ison is strongly basic and a poor leaving group. However‚ alcohols readily undergo
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Chapter 7 Matching Match each item with the correct statement below. a. halide ion e. valence electron b. octet rule f. coordination number c. ionic bond g. metallic bond d. electron dot structure ____ 1. an electron in the highest occupied energy level of an atom ____ 2. Atoms react so as to acquire the stable electron structure of a noble gas. ____ 3. a depiction of valence electrons around the symbol of an element ____ 4. an anion of chlorine or other halogen ____ 5. the force of attraction
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pieces of zinc metal‚ each approx 1 cm × 1 cm 3 test tubes Part 4. Effect of a Catalyst 3% hydrogen peroxide‚ H2O2 – 10 mL per group 0.1 M iron(III) nitrate‚ Fe(NO3)3 0.1 M sodium chloride‚ NaCl 0.1 M calcium chloride‚ CaCl2 0.1 M potassium nitrate‚ KNO3 0.1 M manganese chloride‚ MnCl2 100-mL graduated cylinder 10-mL graduated cylinder 7 test tubes per group 1 PROCEDURES Part 1. Effect of Particle Size on
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(oC) | B.P. (oC) | Density (g/mL) | 4-Nitroaniline | 138.12 | 146-149 | 260 | 1.40 | Azobenzene | 182.22 | 65-68 | 293 | 1.09 | Benzoic Acid | 122.12 | 121-125 | 249 | 1.30 | Methylene Chloride | 84.93 | -97 | 39.8-40 | 1.32 | G. Procedure – The 2:1:1 mixture was dissolved in methylene chloride in a beaker and transferred to a separatory funnel. Hydrochloric acid was added‚ and the resulting separated layers were extracted from the funnel. Hydrochloric acid was added and extracted
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CHE 145 B5z1 Lab Exam I Name_____________________ Direction: Answer the questions and show your work in the space provided. 1. Convert the following numbers to standard exponential form: a) 0.00352 _____3.52x10-3__ __ b) 0.01847 _____1.847x10-2____ c) 7‚604 ________7.604x103__ _ d) 536.2 x 105 ____5.362x107 _______ 2. How many significant figures are there in the following: a) 0.10849 ________5_________ b) 0.864 _______3_______
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om 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 answer
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