1 19 What Acids & Bases
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Transcript of 1 19 What Acids & Bases
Launch: 1/19 Grab your binder and immediately take a seat!
Place launch paper on your desk.
Friday’s Quiz Data:
Today’s Objective: I can describe the properties of acids and bases.
90%
Launch: 1/19 Grab your binder and immediately take a seat!
Place launch paper on your desk.
Friday’s Quiz Data:
Today’s Objective: I can describe the properties of acids and bases.
82%
Launch: 1/19 Grab your binder and immediately take a seat!
Place launch paper on your desk.
Friday’s Quiz Data:
Today’s Objective: I can describe the properties of acids and bases.
80%
Launch: 1/19 Grab your binder and immediately take a seat!
Place launch paper on your desk.
Friday’s Quiz Data:
Today’s Objective: I can describe the properties of acids and bases.
87%
Launch: 1/19 Partner norms
10 minutes to fill out sheet
Announcements Second-half of Unit #6: Acids & Bases
The semester ends on Friday! Progress report @ end of class
Missing assignments due Thursday 1/21
Lab make-ups on Wed during tutoring
Friday’s quiz Tomorrow’s lab
Unit #6 exam moved to Thursday 1/28
January Calendar
What are acids & bases?
Mr. Heffner 1/19/10
What is a solution? A solution is…
a homogeneous mixture made up of a solute and a solvent Example: sugar and water
Non-example: sand and water
What are acids and bases? Solutions can be classified as…
Acids pH < 7 taste sour
Ex: lemon juice burn skin turn litmus paper red
Bases pH > 7 taste bitter
Ex: soap feel slippery turn litmus paper blue
“pH scale”
Examples
Is it an acid, a base, or neutral solution? Vinegar Water
Baking soda Drain cleaner HCl (hydrochloric acid)
Foldable Use colored pencils to create a book about acids/
bases Front page: Title, name, block, date Acids
Page 1: Properties
Page 2: Examples
Bases Page 3: Properties
Page 4: Examples
Page 5 & 6: labeled pH scale
Practice Questions Practice question worksheet
Exit Slip
1. Which of the following is true about acids? a. they taste bitter b. they turn litmus paper blue c. they have a pH of greater than 7
d. they taste sour and turn litmus paper red
Exit Slip 2. Unlike acids, bases
a. feel slippery and have pH values greater than 7 b. turn litmus paper red
c. taste sour and turn litmus paper blue d. are always dangerous because they can burn skin
Exit Slip 3. Baking soda is an example of an
a. acid because it turns litmus paper red b. base because it has a pH of about 8.5
c. acid because it turns litmus paper blue d. base because it tastes similar to lemons
Exit Slip 4. Which of the following solution is the most basic?
a. vinegar b. milk
c. soap d. drain cleaner
Exit Slip 5. Which of the following solutions would have the
highest acidity? a. pH 11 b. pH 9 c. pH 5
d. pH 2
Homework Finish practice questions