Single Replacement Online Lab
Double Replacement Solubility
• Objective:
– Today I will be able to:
• Predict the products of single replacement and double replacement
reactions
• Apply the solubility rules to determining the state of a compound in a
double replacement reaction
• Use the activity series of metals and the periodic table to determine if
a single replacement reaction will occur
• Evaluation/Assessment:
– Informal assessment: Listening to student interactions as they complete
the lab and practice
– Formal assessment: Analyzing student responses to the lab and practice
problems
• Common Core Connection
– Use technology and digital media strategically and capably
– Value Evidence
– Build Strong Content Knowledge
– Use appropriate tools strategically
– Make sense of problem and persevere in solving them
Lesson Sequence
• Evaluate: Warm – Up
• Explain: Single Replacement Reaction Notes
• Explore and Elaborate
– Stations
• Activity 1: Single Replacement Online Lab
• Activity 2: Double Replacement solubility rules
• Evaluate: Exit Ticket
Warm - Up
• Translate, balance and identify the following
reaction
– Potassium phospate + hydrogen chloride
potassium chloride + hydrogen phospate
Objective
• Today I will be able to:
Homework
• Finish Classwork Activities
• Study for Translating, Balancing, Identifying
Reactions Mini – Exam
– B-day – Thursday, February 7
– A-day – Friday, February 8
• Wear Closed Toe Shoes Next Class!
Agenda
• Warm – Up
• Single Replacement predicting product notes
• Stations
– Activity 1: Single Replacement Online Lab
– Activity 2: Double Replacement solubility rules
• Exit Ticket
Single Replacement Reaction
Notes
Predicting Products
Review: What is a single
replacement reaction?
•
A free element reacts with a compound to
form a new compound and to release one
of the elements of the original compound
General Equation: AB + C  AC + B
Examples
•
•
–
–
2 HCl + Mg  MgCl2 + H2
2 KI + Cl2  2 KCl + I2
Two types of single replacement
reactions
Metallic Free
•Free element is a metal
•Most common
•Example
•Mg + 2HCl  MgCl2 + H2
Non – Metallic Free
•Free element is a non-metal
•Example
•KI + Cl2  KCl + I2
Free elements will not always
switch places… so how can we
determine when a single
replacement reaction will occur?
If the single replacement reaction
is metallic free:
• Use the activity series
of metals
• Anything higher on the
list as a free element
will replace anything
lower on the list from a
compound
Examples:
• 2 Na + PbCl2  2 NaCl + Pb
• This reaction occurs because sodium is higher
on the activity series than lead
• Al + NaCl  No Reaction
• This reaction does not occur because
aluminum is NOT higher on the activity series
than sodium
If the single replacement reaction
is non-metallic free:
• Use the periodic table
• Any free element higher
in a family on the
Periodic Table can
replace any lower
element from a
compound.
• Why does this work?
Examples
• Cl2 + 2 NaI  2 NaCl + I2
• This reaction occurs because chlorine is higher
in its family than iodine
• S + H2O  No Reaction
• This reaction does not occur because sulfur is
lower in its family than oxygen
Activity Stations: Today you will
complete 2 activities. The single
replacement online lab and the
solubility rules.
Station 1: Single Replacement
Online Lab
• Half of the class will complete first
• Follow this shortened link:
http://bit.ly/pbRDEi
• The directions for the lab are at each
computer. Take your data table and complete
following the directions
Station 2: Double Replacement and
Solubility Rules
• Stay in the desk area and complete with Ms.
Ose
• When done, each station will flip –flop places
Double Replacement Reaction
Notes
Predicting Products and States
Remember Double Replacement
Reactions
•
Two ionic compounds react to form two
new ionic compounds; “switching
partners”
General Equation: AB + CD  CB + AD
Examples:
•
•
–
3 CaCl2 + 2 AlN  2 AlCl3 + Ca3N2
Double Replacement Reactions
• Cations switch places with cations OR think of
it as “metals switching with metals”
• 3 CaCl2 + 2 AlN  2 AlCl3 + Ca3N2
• In double replacement reactions:
– Each compound formed must be checked to see if
it forms a precipitate, liquid or gas
•
•
•
•
Gas(g)
Precipitate (s)
Aqueous solution (aq)
Liquid (l)
– If a gas, water, or precipitate is not formed, the
reaction will not take place
– Use solubility rules to determine the state of the
product formed
Examples
• Formation of a precipitate
- AgNO3(aq) + NaCl(aq)  NaNO3(aq) + AgCl(s)
• Formation of a gas
- FeS(s) + 2 HCl(aq)  2 H2S(g) + FeCl2(aq)
• Formation of water
- HCl(aq) + NaOH(aq)  NaCl(aq) + H2O(l)
Complete Double Replacement
Reaction Predicting Product
Practice
Exit Ticket
• Single Replacement Online Lab:
– What did you find most challenging about the
online lab? Why?
• Double Replacement Practice
– Which problem was the most challenging? Why?