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# notestest4 - Notes Test 4 chapters 10 and 12 Chapter 10...

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Notes Test 4 chapters 10 and 12 Chapter 10 Balancing Equations. 1. Law of Mass Action Page 345 In any ordinary chemical reaction, matter is not created or destroyed. 1. Terms: 2H 2 + O 2 2 H 2 O means yields H 2 and O 2 are called reactants. ( to the left of the arrow) H 2 O is the product. (to the right of the arrow) Coefficient- the big numbers used to balance. In above example the 2 in front of H 2 and the 2 in front of H 2 O. The coefficients may stand for moles, molecules ( or atoms), and liters, but they can't stand for grams. Subscripts- small numbers below the symbol. In H 2 O the 2 is called a subscript.

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Law of conservation of Mass p 345 Law of conservation of mass- mass is neither created or destroyed in any ordinary chemical reaction. Complete pages 7 and 8 of the packet. Here is how you will know if your answer is correct. 2H 2 + O 2 → 2 H 2 O 4 At the end of the equations there will be a number. Using the equations above, the number is 4. That is the sum of the coefficients you used. In other words, you use a 2 in front of H 2 and a 2 in front of H 2 O. That add up to 4. Do not include the understood 1 that is in front of O 2 . Lab project is due Nov, 18.
Nov. 11 Continue Chapter 10 Board Problems: Balancing equations and balancing word equations 1. Balance the following equations: (a) PCl 3 + H 2 O H 3 PO 3 + HCl sum of coefficients used 6 (b) Na + Cl 2 NaCl sum of coefficients used 4 (c) Al + Cl 2 AlCl 3 sum of coefficients used 7 (d) Fe 2 (SO 4 ) 3 + NaF FeF 3 + Na 2 SO 4 sum of coefficients used 11 (e) H 2 SO 3 + O 2 H 2 SO 4 sum of coefficients 4 2. (a) Calcium Chloride + Sodium Sulfate Calcium Sulfate + Sodium chloride CaCl 2 + Na 2 SO 4 CaSO 4 + 2NaCl (b) sulfuric acid + Aluminum aluminum Sulfate + hydrogen 3 H 2 SO 4 + 2Al Al 2 (SO 4 ) 3 + 3H 2 (c)lithium phosphate + iron(II) nitrate lithium nitrate + iron(II) phosphate 2Li 3 PO 4 + 3 Fe(NO 3 ) 2 6 LiNO 3 + Fe 3 (PO 4 ) 2 Types of reactions: A. 2H 2 O → 2H 2 + O 2 Decomposition Reaction ( start with one thing and end with two) B. 2H 2 + O 2 → 2 H 2 O Synthesis ( start with two things and end with one ) C. Mg + 2 HCl → MgCl 2 + H 2 Single Displacement ( element and compound yields and element and a compound)

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D. HCl + NaOH
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## This note was uploaded on 01/03/2011 for the course CHEM 3302 taught by Professor Dickpowell during the Spring '10 term at UT Arlington.

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notestest4 - Notes Test 4 chapters 10 and 12 Chapter 10...

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