WebLecture: Acids and Bases
Kotz and Triechel, Chemistry and Chemical Reactivity Chapter 3: Sections 6-7.
3.6 Acids and Bases There are several definitions of what characterizes an acid and a base; eventually you will learn all of them. For the current chapter, we define acids as proton donors and bases as proton acceptors OR chemical compounds that change the "free proton" or H+ population of a solution. Acidity or acid strength (or base strength) indicates how thoroughly a given substance dissociates.
Acid-base reactions will occur between two strong components (strong acid - strong base), or between a strong and a weak component (strong acid, weak base; weak acid, strong base). Be sure that you understand the outcome of a strong acid-strong base reaction and the implications for dealing with strong acids or bases safely!
3.7 Gas-Forming Reactions Many acid-base reactions involve combining acids with metal carbonates, which immediately breakdown to form CO3 gas. This characteristic is often used by geologist to analyze rock samples for the presence of carbonates as an aid to the classification of the sample. Be able to recognize a metal carbonate (usually an alkaline metal or alkaline earth metal plus the CO3 ion).
Review the Videos at Thinkwell Video Lessons under REACTIONS IN AQUEOUS SOLUTIONS.
Homework problems: Please visit the Moodle for the current assignment and posting instructions. Do all the homework problems assigned and check the forum for your posting assignment.
Determination of water in copper sulfate pentahydrate and sodium hydrogen carbonate
What is the Amount of Water in Common Hydrates?
For this week: Carry out the method you devised last week to dehydrate a common household chemical and determine its formula by conservation of mass.
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