Prayer/Next Prayer Check Homework Attendance

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1 Prayer/Next Prayer Check Homework Attendance

2 CHAPTER 5 REVIEW NAMING POLYATOMIC IONS & ACIDS Ms. Doshi

3 Review: Name These! Cu 2 O PCl 5 Rb 2 S SnCl 4 B 2 O 3 MgBr 2 MnS 2 SF 6 KI

4 Naming Compounds that Contain Polyatomic Ions polyatomic ions -charged entities made of many atoms Example: NH 4 NO 3 contains these polyatomic ions: NH 4+ and NO 3 - oxyanions -polyatomic anions that contain an atom of a given element and different number of oxygen atoms.

5 Give for Test Need to give memory aid to students.

6 Naming Compounds with Polyatomic Ions 1. Similar to Type I binary ionic compounds Example: NH 4 C 2 H 3 O 2 is ammonium acetate. 2. When you see a metal that can form one or more cation, use a Roman Numeral. Similar to Type II binary ionic compounds. Example: FeSO 4 is iron(ii) sulfate

7 Now, you try!

8 Name the following compounds a) Na 2 CO 3 b) FeBr 3 c) CsClO 4 d) PCl 3 e) CuSO 4 a) NaHCO 3 b) BaSO 4 c) CsClO 4 d) BrF 5 e) NaBr f) KOCl g) Zn 3 (PO 4 ) 2

9 Naming Acids acid: -a molecule with one or more H + ions attached to an anion

10 Rules (in your textbook)

11 Use Rule 2 Acid Anion Name HClO 4 perchlorate perchloric acid HClO 3 HClO 2 HClO chlorate chlorite hypochlorite chloric acid chlorous acid hypochlorous acid

12 Names of acids that do not contain oxygen

13 Names of some acids that contain Oxygen

14 Write the Formulas from Names

15 Chapter 5 Review Questions 10, 12, 14, 18 30, 34, 36, 40, 42, 44, 46, 48, 50 58, 66, 80, 84, 92 Answers are in the printout! Study hard!!

16 CHAPTER 6 CHEMICAL REACTIONS: AN INTRODUCTION Ms. Doshi

17 Evidence for a Chemical Reaction How do we know that a chemical reaction has occurred? 1. The color changes. (We can see this) 2. A solid forms. (We can see this.) 3. Bubbles form. (We can see this.) 4. Heat and/or a flame is produced, or heat is absorbed. (We can t see heat but we can feel it).

methane gas + oxygen forms a flame in a Bunsen Burner

v=cmxbgbj6ipm Picture Evidence of a Chemical Reaction

and oxygen gas are formed. v=cjmumbfvtlo Cold pack.

absorb heat quickly. Warm pack. Open the package.

solution v=rywsghhblwq sodium dichromate + lead nitrate forms a

18 methane gas + oxygen forms a flame in a Bunsen Burner Picture Evidence of a Chemical Reaction Explanation An electric current passes through water, hydrogen and oxygen gas are formed. Cold pack. You break an ampule, the reaction begins causing that pack to absorb heat quickly. Warm pack. Open the package. Oxygen reacts with chemicals in the bag, heat is produced for many hours. HCl (colorless)+ cobalt(ii)nitrate (red) produces a blue solution sodium dichromate + lead nitrate forms a solid. calcium (metal) + water forms hydrogen gas (bubbles)

19 A Chemical Reaction chemical reaction -represented by a chemical equation reactants -chemicals present before the reaction products -chemicals formed by the reaction reactants products Example: arrow = direction of change, read as yields or produces

20 Very IMPORTANT!!! In a chemical reaction, atoms are neither created or destroyed. The number of each type of atom on the reactant side = the number of each type of atom on the product side. This is called balancing the chemical equation

21 Unbalanced Equation and Balanced Equation Unbalanced Equation Balanced Equation

22 Physical States Symbol (s) (l) (g) (aq) State solid liquid gas dissolved in water (aqueous solution) Example: Unbalanced Equation with Physical States

23 Write Unbalanced Equations Example 6.1 Exercise 6.1.

24 A Chemical Equation A chemical equation gives us this information: 1.the reactants and products 2.the numbers of each 3.the physical states We want our equations to be balanced and show the physical states of all of our reactants and products.

25 How to Write and Balance Chemical Equations Let s do together: Let s balance the equation for liquid ethanol. (p162) 1. Read the description of the chemical reaction. What are the reactants? The products, and their states? Write the formulas. 2. Write the unbalanced equation. 3. Balance the equation. Start with the most complicated molecule (the one with the most elements). 4. Check to see that the coefficients used give the same number of each type of atom on both sides of the arrow.

26 Balancing Chemical Equations I Let s do together:

27 Balancing Chemical Equations II Let s do together: NH 3 (l) + O 2 (g) NO (g) + H 2 O (g)

28 Self Check Exercise 6.2 C 3 H 8 (g) + O 2 (g) CO 2 (g) + H 2 O(g)

29 Balancing Chemical Equations III Let s do together:

30 Now, it s your turn: Exercise 6.3

31 Problems to do: RIGHT NOW! Chapter 6 Review 38, 40, 42, 44, 60, 73, 75

32 WE ARE NOT FINISHED! Chapter 4-5 Review (In English print) 22, 24, 26, 28, and 30

33 Any Questions? Any Answers? Any Comments?

AP Chemistry (1 of 20) AP Chemistry (2 of 20) AP Chemistry (3 of 20) AP Chemistry (4 of 20) AP Chemistry (5 of 20) AP Chemistry (6 of 20)

AP Chemistry (1 of 20) AP Chemistry (2 of 20) AP Chemistry (3 of 20) AP Chemistry (4 of 20) AP Chemistry (5 of 20) AP Chemistry (6 of 20) Ions Ionic Charges of Representative Elements (1 of 20) (2 of 20) Formulas and Names of Common Metal Ions with More than One Common Ionic Charge Some Common Polyatomic Ions (3 of 20) (4 of 20) Naming Monatomic