Ch 4 Aqueous Reactions

Ch 4 Aqueous Reactions - Aqueous Solutions Aqueous...

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1 Aqueous Reactions and Solution Stoichiometry Chapter 4 Aqueous Solutions A solution is a homogeneous mixture In an aqueous solution, water is the solvent. Dissolving NaCl in Water Dissolve Electrolytes Electrolytes dissolve in water to form ions. Electrolytes are: Soluble ionic compounds such as NaCl and AgNO 3 Acids such as HCl and HNO 3 Bases such as NaOH Nonelectrolytes What kinds of compounds are nonelectrolytes? Dissolving Nonelectrolytes CH 3 OH(l) CH 3 OH(aq)
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2 Identify each substance in water as a strong electrolyte, weak electrolyte, or nonelectrolyte. Explain. (Water molecules have been left out) Dissolving Electrolytes NaCl(s) Na + (aq) + Cl - (aq) Mg(NO 3 ) 2 (s) Mg 2+ (aq) + 2NO 3 - (aq) K 3 PO 4 (s) HCl(g) Aqueous Reactions often Involve Electrolytes Double-Displacement Reactions also called Exchange or Metathesis Single-Displacement Reactions a type of oxidation-reduction reaction Double-Displacement Reactions (Exchange) AB + CD AD + CB Examples: NaCl(aq) + AgNO 3 (aq) NaNO 3 (aq) + AgCl(s) HCl(aq) + NaOH(aq) NaCl(aq) + H 2 O(l) Double-Displacement Reactions (Exchange) AB + CD AD + CB 3 Different types: 1. Precipitation Reaction (a solid forms) 2. Gas-Forming Reaction 3. Acid-Base Neutralization Reactions Mixing Two Aqueous Solutions Cl - Na + Cl - Cl - Na + Na + Ag + Ag + NO 3 - NO 3 - Ag + NO 3 - NaCl(aq) AgNO 3 (aq)
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3 Precipitation Reactions AgNO 3 (aq) + NaCl(aq) AgCl(s) + NaNO 3 (aq) Macroscopic Molecular Precipitation Reactions AgNO 3 (aq) + NaCl(aq) AgCl(s) + NaNO 3 (aq) Complete Ionic Equation: Ag + (aq)
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This note was uploaded on 01/27/2010 for the course CHM 71476 taught by Professor Marks during the Spring '10 term at ASU.

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Ch 4 Aqueous Reactions - Aqueous Solutions Aqueous...

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