Science Starter HW ON DESK What is the formula for sodium chloride? What about for chlorine? Does AuSO4 have a polyatomic ion? What is the difference between double and single replacement reactions? 4. Balance: ____ N2 + ____ F2  ____ NF3 5. What is the trend for electronegativity?

SWBAT read and understand the activity series Objective SWBAT predict the products for both single and double replacement reactions with balanced equations SWBAT read and understand the activity series

Agenda Science Starter Predicting Products Exit Ticket/Homework Single Replacement Double Replacement Practice Exit Ticket/Homework

Unit 4: Chemical Reactions Predicting Products

What is the difference between double and single replacement? DOUBLE REPLACEMENT __Na + _MgCl2 __ NaCl + __Mg NaOH+H2SO4Na2SO4+ H2O

Double or Single? ____Ba + ____AuSO4  ____ PbSO4 + ____ AgNO3  ____ KMnO4 + ____ ZnCl2 

CaCl2 + AgNO3 Ca(NO3)2 + AgCl QUICK CHECK C3H8 + 5 O2 3 CO2 + 4 H2O H2+ N2  NH3 Fe + CuCl2  Cu + FeCl3 CaCl2 + AgNO3 Ca(NO3)2 + AgCl

Predicting Products – Single Replacements Notes Predicting Products – Single Replacements Definition: One element replaces another element A +BC  AC +B

Who would have an easier time finding a date? Or If you were dating Jabba the Hut, would you replace it with Drake?

Lithium (Li) is like Drake Lithium (Li) is like Drake. He will always be able to get a date with another element. Jabba the Hut is like Mercury (Hg). If he gets a date he can easily be replaced.

Notes A. Elements higher on the activity series can replace elements lower on the chart. - Ex: Lithium (Li) can replace Mercury (Hg) B. Elements lower on the chart CANNOT replace elements higher on the chart. - Ex: Iodine (I2) cannot replace Fluorine (F2)

C. Could this reaction occur? K + BaCl2  Ba + KCl Notes C. Could this reaction occur? K + BaCl2  Ba + KCl Example Problem: Why?

Single Replacement Partner Problems With your partner, decide if the following reactions will occur. Rb + LiF  F2 + MgCl2  Na2S + K 

Single Replacement – Predicting the Products STEPS: Determine which are switching (metals or halogens?) Will partnered element trade up? (Look at activity series) If the reaction will occur, swap, drop, and chop and balance equation Predict the products of the following reactions: Ex. KF + Li 

You Try! Predict the products of the following reactions: 1. NaCl + F2  2. Li2O + Na 

Predicting Products – Double Replacement

Predicting Products – Double Replacement Notes Predicting Products – Double Replacement Double Replacement: Elements switch partners AB + CD  AD + BC

Predicting Products – Double Replacement Notes Predicting Products – Double Replacement A. You can predict products if you follow the general equation. A B + C D A D + C B CaCl2 + AgNO3 Ca(NO3)2 + AgCl B. You will also have to use your PToE and the polyatomic ion chart to swap, drop, and chop charges

Double Replacement Sample Problems STEPS: Put parentheses around polyatomic Switch metals Swap, drop and chop charges to make the products and balance 1. __NaOH + __KNO3

Partner Practice 2. K2SO4 + Mg(OH)2 3. __MgSO4 + __AgNO3  4. NaBr + Ca(OH)2  5. __Li2O + __NaNO3 

Group Work Take 2 You should not be moving around the classroom. I should not see any cell phones. I should not hear your voice over anyone else’s. You should be ON TASK. If you have any questions, ask 3 before you ask me.

PRE-LAB WORK (aq) = aqueous (g) = gas (l) = liquid (s) = solid You must work with your group to complete “Part II” of your Homework packet… it will help you in turning verbal equations into formula equations!! You will need to do this in your lab report/write-up tomorrow! (aq) = aqueous (g) = gas (l) = liquid (s) = solid

Exit Ticket 1. Consider this incomplete chemical equation: Ba + CuCl2  What are the products of this equation? BaCl2 and CuCl2 BaCuCl2 and Ba BaCl2 and Cu BaCu and Cl2 BIG QUIZ TOMORROW!! WORKSHEET #4 is HOMEWORK!