Review of Chem 1 - DP's CHEM I Review For Hill Petrucci...

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DP’s CHEM I, Review For Hill, Petrucci, McCreary & Perry, General Chemistry, 4 th Ed. DP’s General Approach: Keep in mind that all of “chemistry book-work” is a written record of what happened in the experiment or what occurred in nature. This sort of communication is very important if you which to record the goings-on around you. Chemistry is a language of its own. In CHEM I, you are asked (or should have been asked) to learn the Periodic Table (the alphabet) and how to describe some simple reactions (make sentences). This review is designed to get you to remember all those necessities. The word “memorize” appears a lot in this review and that is a big part of CHEM I. Like any language, chemistry builds on itself. You just can’t skip over stuff. Topics to Review: Chapter 1 - Problem solving by unit-conversion (aka multiplying by 1 in a complicated manner) Problem: 83. If you have always struggled with dimensional analysis, ask DP about the De Durian method. Chapter 2 – Remember how to speak chemistry: Memorize the charges, names, and formulas of the ions, polyatomic anions Figure 2.10, Table 2.4. How to name acids, Table 2.5, you must know these at all times and be able to recount them instantly. Having to look them up every time will only wear you down and make you want to quit. Problems: 55 and 57. Chapter 3 – Stoichiometry, How to make a sandwich. Read Chapter 3 concept review page 114. A. Chemical formulas give the atom/mole ratio of elements per compound. Example: There are 6 moles of oxygen to one mole of C 6 H 12 O 6 (pronounced, sugar). This can also be written as 6 mol. C/1 mol sugar. Problems: 25 & 26 B. Memorized Avagadro’s number. 6.022 X 10 23 . This has units of things/mole. Problems: 27a & 27c C. Molar mass. The mass of one mole of things, units are g/mol Problems: 21 &23 D. Balance chemical reactions: reactants are on the left, products on the right. Same amounts of compound should be on each side of reaction. Problem: 53 E. Chemical reactions give mole ratios between the participants. Units are moles of chemical per mole of some other chemical. Mol A/mol B. Problem: 55 F. Stoichiometry: Calculate amounts of products and reactants in a chemical reaction. This is a bugger for a lot of folks, basically it is unit conversion using concepts in sections A – E above. See 3.8 on page 115.
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