liquid added can be determined to the nearest 0.01 mL with practice. Clay triangles are placed on a ring attached to a ring stand as a support for a funnel‚ crucible‚ or evaporating dish. Droppers are for addition of liquids drop by drop Erlenmeyer flasks are useful to contain reactions or to hold liquid samples. They are also useful to catch filtrates. Glass funnels are for funneling liquids from one container to another or for filtering when equipped with filter paper. Graduated cylinders are
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Synthesis of Cyclohexanol Author: Ahmed Ayyash 06/06/13 Introduction: In this experiment‚ cyclohexanol was prepared from an initial cyclohexene. However‚ this occurred over a number of steps‚ these are out lined below. 1. Cyclohexene + aqueous acid cyclohexyl cation 2. cyclohexyl cation + hydrogen sulphate + water protonated cyclohexanol + cyclohexyl hydrogen sulphate 3. cyclohexyl hydrogen sulphate protonated cyclohexanol + HSO4 4. protonated cyclohexanol + HSO4
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10mL of distilled water to the flask. 9. Then they added 3 drops of phenolphthalein to the flask‚ and swirl the flask to mix thoroughly. 10. Then they started to move the flask‚ next observed the substance until the substance until the substance changes his color. 11. They began the titration by added NaOH to the flask. For the initial trial they may want to add the base fairly quickly until they notice a pink colour appearing in the flask. Swirling the flask should make the pink colour
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Determining the value of molar mass of chosen compound Marta Dürrigl 1mmA Chemical reaction: b.) CaCO3 (s) + 2HCl (aq) ----------- CaCl2 (aq) + CO2 (g) + H2O(l) AIM: The aim of this investigation is to experimentally determine the molar mass of carbon dioxide (CO2) by measuring its volume and calculating its mass. CO2 which we will measure will arise as a product of a chemical reaction between Calcium Carbonate (CaCO3) and Hydrochloric acid (HCl) as it is shown in the chemical
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molar mass of an unknown volatile liquid. Heating a flask filled with an unknown‚ easily evaporated liquid will allow for measurements that can be taken to work out the ideal gas equation. This lab will require knowledge of basic equations used in chemistry. Using these equations‚ such as density and number of moles(n)‚ we can substitute different values into the ideal gas law to manipulate it. II. Materials: 250-mL Erlenmeyer flask Needle or pin Unknown liquid
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vigorously in a sealed vial. (Caution! Be sure the vial is sealed because oxone is a strong oxidizer.) Dissolve 50 L of cyclohexene in 2.0 mL of acetone in a small Erlenmeyer flask. Cool the cyclohexene solution in an icebath‚ then add the oxone solution dropwise over 5 minutes with swirling in the icebath. Remove the Erlenmeyer flask from the icebath and allow the reaction to sit for 15-30 minutes. (To save time‚ this is a good place to start the potassium permanganate reaction.) Add two drops
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used to measure out 15 mL of glacial (concentrated) acetic acid. This was poured into a 125 mL Erlenmeyer flask. Both graduated cylinders were rinsed thoroughly with acetone several times. The 2‚6-dimethylaniline was added via a Pasteur pipet to the acetic acid. The graduated cylinder was rinsed with acetone and left to air dry. 2 mL of 2-chloroacetyl chloride was measured and poured into the Erlenmeyer flask. A thermometer was placed to record any temperature change during this process. A large graduated
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Lab Report # 11 By: Andrew Hoitt CHEM 105 Lab 11/29/2012 Lab # 11 – Acid - Base Titration Introduction: The purpose of this lab is to determine the molarity (M) of an unknown HCl solution. A NaOH solution will be made and its molarity calculated. A sample of the NaOH solution will be titrated against the unknown HCl solution to calculated the volume needed to neutralize it. With these volumes the unknown molarity can be calculated. Theory: Solutions
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Acid-Base Titration Pre-Lab Discussion In the chemistry laboratory‚ it is sometimes necessary to experimentally determine the concentration of an acid solution or a base solution. A procedure for making this kind of determination is called an acid-base titration. In this procedure‚ a solution of known concentration‚ called the standard solution‚ is used to neutralize a precisely measured volume of the solution of unknown concentration to which one or two drops of an appropriate acid-base
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A. Goal and Purpose: Session 1: In this lab‚ we will achieve a simple Friedel-Crafts alkylation of anthracene. The choice of anthracene as an aromatic substrate stems from two considerations. First‚ there is a question of regioselectivity. Second‚ anthracene and its derivatives are highly visible under UV light. Session 2: In this lab‚ we will complete a partial conversion of 9-acetylanthracene using m-chloroperoxybenzoic acid (mCPBA). We will also determine by NMR‚ the regiochemistry of the
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