Unit : Chemical Equations & Reactions Ch 11 Chlorine is a deadly poison gas employed on European battlefields in World War I. Sodium is a corrosive metal which burns upon contact with water. Together they make a placid and unpoisonous material, table salt. Why each of these substances has the properties it does is a subject called chemistry. -- Carl Sagan

1/14 Bell Work A survey of 50 editors showed that 20 could write with their left hand and 10 could write with either hand. How many could write with their right hand?

1/14 Schedule Notes Ch 11.2 “Types of Reactions” Conservation of Mass Lab Assignments: 1.Mol to Grams and MgO Empirical Formula Lab – LATE 2.SR 11.1 “Describing Chemical Reactions” -- LATE 3.Classifying and Balancing Eq -- THURSDAY Project LEAP Robots are coming! Sign up!

Metals Up in Flames Locate Cu, Mg, and Fe on the Periodic Table. Predict which metal will be the most, middle, and least reactive. Watch the demo and write the balanced reactions. Were you right about reactivity? Why or why not?

Predicting the Products of a Chemical Reaction Predicting the Products o The number of elements and/or compounds reactants is a good indicator of possible type and products. 11.2

Predicting the Products of a Chemical Reaction 11.2

Predicting the Products of a Chemical Reaction 11.2

Predicting the Products of a Chemical Reaction 11.2

Predicting the Products of a Chemical Reaction 11.2

Predicting the Products of a Chemical Reaction 11.2

11.2 Section Quiz. 1. What type of reaction is described by the following equation? 6Li + N 2  2Li 3 N combination reaction decomposition reaction single-replacement reaction combustion reaction

11.2 Section Quiz. 2. Balance the following equation and indicate whether it represents a combustion, combination, or decomposition reaction. H 2 SO 4  H 2 O 2 + SO 2 H 2 SO 4  H 2 O 2 + SO 2, combination reaction H 2 SO 4  H 2 O 2 + SO 2, decomposition reaction H 2 SO 4  2H 2 O 2 + SO 2, combination reaction H 2 SO 4  2H 2 O 2 + SO 2, decomposition reaction

11.2 Section Quiz 3. Predict the missing product in the following unbalanced equation. Pb(NO 3 ) 2 + KOH  KNO 3 + ____________ PbOH 2 Pb(OH) 4 Pb(OH) 2 PbOH

Practice Balancing Equations Try to balance equations on the cards! Check your answer. Try another card.

1/15 Bell Work Pete Platform and Gary Gladhand met at a club to discuss the overthrow of their party leader. They each ordered Pepsi on the rocks. Gary downed his and ordered another. He gulped down the second, but decided to wait on the third. Meanwhile, Pete, who was sipping his drink suddenly dropped over dead. Both men were set up for assassination. Where was the poison? Why did Gary survive, but Pete died?

1/15 Schedule Exploring Chlorine Compounds Lab Assignments: 1.Mol to Grams and MgO Empirical Formula Lab – LATE 2.SR 11.1 “Describing Chemical Reactions” -- LATE 3.Classifying and Balancing Eq -- TODAY Project LEAP Robots are coming! Sign up!

1/16 Bell Work In 1773, a child was born legally in Boston, Massachusetts to parents who were both legally born in Boston, Massachusetts. This child and their parents were not American citizens. How is this possible? HINT: Which other country could they be a citizens of? How?

1/16 Schedule Exploring Chlorine Compounds Lab – Finish Lab o FeCl 3 should have reacted like CuCl 2 to Al Balancing Eq Race Assignments: 1.Mol to Grams and MgO Empirical Formula Lab – LATE 2.SR 11.1 “Describing Chemical Reactions” -- LATE 3.Classifying and Balancing Eq -- LATE Project LEAP Robots are coming! Sign up!

1/20 Bell Work If there are 6.02 x atoms in a mole, how many moles are there in 18 x atoms of iron?

1/20 Schedule Chemistry Adventure Info Exploring Chlorine Compounds Lab – due TODAY o FeCl 3 should have reacted like CuCl 2 to Al Notes Ch 11.3 “Reactions in Aqueous Solution” Balancing Eq #11-20 and SR 11.3 Assignments: 1.Classifying and Balancing Eq – LATE 2.Finish Balancing Eq Race for WEDNESDAY 3.SR 11.3 due THURSDAY Project LEAP Robots are coming! Sign up!

Reactions in Aqueous Solution Structures in limestone caverns are formed when carbon dioxide converts calcium hydrogen carbonate into calcium carbonate. The calcium carbonate precipitates and forms dramatic stalactites and stalagmites. 11.3

Ch 11.3 “Reactions in Aqueous Solution” Objectives Describe in information found in a net ionic equation. Predict whether double-replacement reactions will form precipitates.

Ionic Equations Equation that shows dissolved ionic compounds as dissociated free ions What is the word equation for this reaction?

Net Ionic Equations Net ionic equation s show only those particles that are directly involved in the chemical change. Ions that appear on both sides of an equation and aren’t directly involved in the reaction is called a spectator ion. 11.3

Net Ionic Equations A NIE shows only those particles involved in the reaction and is balanced with respect to both mass and charge. Sodium ions and nitrate ions are not changed during the reaction so the net ionic equation is 11.3

for Conceptual Problem 11.9

Predicting the Formation of a Precipitate Predicting Precipitates General Rules… 11.3

Predicting the Formation of a Precipitate Will a precipitate form when a sodium carbonate solution is mixed with a barium nitrate solution? 11.3

Predicting the Formation of a Precipitate Sodium nitrate is soluble but barium carbonate is insoluble. The net ionic equation is 11.3

11.3 Section Quiz. Identify the correct net ionic equation for the following reaction and the spectator ion, if there is one. FeO(s) + 2HClO 4 (aq)  H 2 O(l) + Fe(ClO 4 ) 2 (aq) 1.FeO(s) + 2H + (aq) + 2ClO 4 - (aq)  H 2 O(l) + Fe 2 + (aq) + 2ClO 4 - (aq); no spectator ion 2.FeO(s) + 2H + (aq) + 2ClO 4 - (aq)  H 2 O(l) + Fe 2 + (aq) + 2ClO 4 - (aq); ClO 4 - is a spectator ion 3.FeO(s) + 2H + (aq)  H 2 O(l) + Fe 2+ (aq); ClO FeO(s) + 2HClO 4 (aq)  H 2 O(l) + Fe(ClO 4 ) 2 (aq); no spectator ion

11.3 Section Quiz. Which one of the following products of double- replacement reactions would NOT form a precipitate? 1.AgCl 2.PbSO 4 3.Mg(OH) 2 4.Mo(NO 3 ) 2

11.3 Section Quiz Which reaction will NOT produce a precipitate from aqueous solution? 1.Hg 2 (NO 3 ) 2 + KCl 2.FeSO 4 + Ba(OH) 2 3.Pb(NO 3 ) 2 + Na 2 CO 3 4.NaBr + Al 2 (SO 4 ) 2

1/21 Bell Work When can you add 2 to 11 and get 1 as the correct answer?

1/21 Schedule Chemistry Adventure Info tomorrow Galileo test – Chem Semester 2 Baseline o ati-online.com o Go to K-12 Student-Parent Center and login o It’s an assignment, try your best! Finish Notes Ch 11.3 and Balancing Eq Race if needed. Assignments: 1.Classifying and Balancing Eq – LATE 2.Finish Balancing Eq Race for TODAY 3.SR 11.3 due THURSDAY

1/22 Bell Work A well known fashion designer wanted to escape the hectic big city. She decided to spend a few days at a rural resort. She felt like a stroll to relax. That was the last time anyone saw her alive. The autopsy revealed that a pack on her back caused her death. How could a pack have killed her? HINT: Think about different definitions for pack.

1/22 Schedule Chemistry Adventure Galileo test? Precipitation Lab Assignments: 1.Classifying and Balancing Eq – LATE 2.Finish Balancing Eq Race LATE 3.SR 11.3 due TODAY Chemistry Adventure is Tuesday, April 7. Reactions and Eq test is TUESDAY

1/23 Bell Work A scale is perfectly balanced when there are 3 cans of soda on one side and one can of soda and a half- pound gold bar on the other side. Draw a picture of the set-up. Figure out how much each soda weighs.

1/23 Schedule Balance Double Replacement Eq Precipitation Lab Assignments: 1.Classifying and Balancing Eq – LATE 2.Finish Balancing Eq Race LATE 3.SR 11.3 LATE Chemistry Adventure is Tuesday, April 7. Reactions and Eq test is TUESDAY

Balance Double Replacements Balance the Eq. Which will form precipitates? ___ PbCl 2 + ___ AgNO 3  ___ Pb(NO 3 ) 2 + ___ AgCl ___ Al 2 (SO 4 ) 3 + ___ BaCl 2  ___ BaSO 4 + ___ AlCl 3

Balancing Equations Race Divide into 2 teams Balance the equations and answer the additional questions o Some are easier than others o 1 pt for being the first team to answer correctly

1/26 Bell Work Draw 4 rectangles. Put 9 X’s in the four rectangles so that there is an odd number of X’s in each. How is this possible? Hint: Can overlap rectangles XXXXXX XXXXXX XXXXXX XXXXXX XXXXXX XXXXXX

1/26 Schedule Finish Precipitation Lab Ch 11 Practice Problems – due TUESDAY Assignments: 1.All previous assignments LATE 2.Ch 11 Practice Problems due TUESDAY Chemistry Adventure is Tuesday, April 7. Reactions and Eq test is TUESDAY

1/27 Bell Work Dan Manly was revisiting his home town when he met an old friend. “I’m married now, but you wouldn’t know it. By the way, this is my daughter,” said the friend. Dan looked down and asked the little girl her name. “It’s the same as my mother’s,” the little girl replied. “Then I bet your name is Susan,” said Dan. “Somebody must have told you!” the little girl exclaimed. How could he know?

1/27 Schedule Lab Practical Ch 11 Practice Problems – due TODAY Assignments: 1.All other previous assignments LATE 2.Ch 11 Practice Problems due TODAY Chemistry Adventure is Tuesday, April 7.

Practical Partners Work with a partner to do the procedure, but you are responsible turning in your own paper. Do NOT whine, complain, or otherwise express a negative opinion of your partner. Deal with each other, or lose points. Groups: Marvelous, Kaynani, and Cheyenne Ronald and Nicole Tracy and Jonell