Exp4_prelab

Exp4_prelab - Experiment 4 Sensors and Chemical Reactions...

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Experiment 4 Sensors and Chemical Reactions
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Objectives Define solution and understand its components Identify major classes of reactions Write chemical equations for various reactions Determine an appropriate sensor to monitor the course of a reaction
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Solutions Homogeneous mixtures of two or more substances The solvent in present in greatest abundance In most cases the solvent is water All other substances are solutes (a) A homogeneous sugar solution and (b) Its molecular –level representation. The water molecules are muted so the sugar molecules are easier to see.
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Dissociation When an ionic substance dissolves in water, the solvent pulls the individual ions from the crystal and solvates them This process is called dissociation or dissolution (a) Ionic crystal (b) Ionic crystal dissolving
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Electrolytes Substances that dissociate into ions when dissolved in water. These solutions will conduct electricity. A nonelectrolyte may dissolve in water, but it does not dissociate into ions when it does so. Therefore, it will NOT conduct electricity. (a) Pure water (b) Glucose solution (c) Sodium chloride solution
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Solubility How easily a solvent can break bonds and form new associations with the solvent. Definition: the concentration of solute in a saturated solution at a specified temperature.
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Solution Chemistry It is helpful to pay attention to exactly what species are present in a reaction mixture (i.e., solid, liquid, gas,
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This note was uploaded on 02/24/2011 for the course CHEM 101L taught by Professor Austell during the Spring '08 term at UNC.

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Exp4_prelab - Experiment 4 Sensors and Chemical Reactions...

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