1 Nov. 2010 Take Out Homework: Week 8 Homework #1-20 Objective: SWBAT review “the language of chemistry” for a test. Do now: Write the formula equation.
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1 Nov. 2010 Take Out Homework: Week 8 Homework #1-20 Objective: SWBAT review “the language of chemistry” for a test. Do now: Write the formula equation for the following word equation: Solid lithium metal reacts with liquid water to produce a solution of lithium hydroxide and hydrogen gas.
Agenda I. Do now II. Homework check/Hand back papers III. Questions? IV. Review for test: complete Test Review from Week 8 Homework Homework: Finish Test Review, study for test!
How do chemists describe chemical reactions? chemical equations: an expression representing a chemical reaction
Word Equation hydrogen gas combines (explosively!) with oxygen gas to produce liquid water reactants: hydrogen, oxygen products: water
Formula Equations H 2 (g) + O 2 (g) H 2 O(l) (s) – solid, (l) – liquid, (g) – gas (aq) – aqueous (dissolved in water) Reactants Products
Symbols in Equations + and, reacts with yields, produces, forms
You must be sure to write correct chemical formulas for reactants and products!
Write the word equation Na 2 O(s) + H 2 O(l) NaOH(aq) Solid sodium oxide reacts with water to yield a solution of sodium hydroxide
Write the formula equation Solid copper (II) reacts with a solution of silver nitrate to yield solid silver and a solution of copper (II) nitrate. Cu(s) +AgNO 3 (aq) Ag(s) + Cu(NO 3 ) 2 (aq)
Practice 1. Zn(s) + HCl(aq) ZnCl 2 (aq) + H 2 (g) 2. Solid magnesium reacts with oxygen gas to yield solid magnesium oxide.
Complete the “Writing Word and Formula Equations Classwork” Homework: Week 8 #
1. CS 2 (l) + O 2 (g) CO 2 (g) + SO 2 (g) 2. Al(s) + ZnCl 2 (aq) Zn(s) + AlCl 3 (aq) 3. Solid iron reacts with oxygen gas to produce solid iron (III) oxide. 4. A solution of manganese (II) oxide reacts with a solution of hydrochloric acid (HCl) to produce manganese (II) chloride, liquid water and chlorine gas.