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Chapter 4 - Chapter 4 Chemical Reactions I Aqueous...

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Chapter 4: Chemical Reactions I. Aqueous Solutions a. NaCl Na + + Cl - i. Strong electrolyte – completely dissociates b. CH 3 COOH CH 3 COO - + H + i. Weak electrolyte – doesn’t completely dissociate 1. Some acetate ions, some protons, some Acetic acid still c. C 12 H 22 O 11 = nonelectrolyte i. Doesn’t dissociate at all II. Precipitation Reactions a. Pb(NO 3 ) 2 + 2KI 2KNO 3 + PbI 2 i. (Molecular equation) ii. A yellow solid precipitates out iii. Since all nitrates are soluble, the PbI 2 is the solid b. Allows you to identify the compounds you have in a solution c. TABLE 4.1 d. Complete ionic equation i. Pb 2+ + 2NO 3 - + 2K + + 2I - PbI + 2K + + 2NO 3 - e. Net ionic equation i. Pb 2+ + 2I - PbI (s) III. Acid-Base Reaction a. Acid i. donates H + ii. H + b. Base i. accepts H + ii. OH - c. Arrhenius Definition i. Acid produce H + in water ii. Base produces OH - in water iii. Dye indicators – determine if acid/base is present IV.Types of Acid/Base a. Strong acid – completely dissociates i. HCl b. Weak Acid – doesn’t completely dissociate i. CH 3 COOH c. Strong Base – NaOH d. Weak Base – NH 3 V. Brønsted and Lowry definition a. Acid = donates a proton
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