1 Nov  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!

Writing chemical equations for reactions

 Dh2mWA Dh2mWA

 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.

 Test Review