1. November 15, 2016 Warm-Up: Complete review worksheet
HOMEWORK: Study for test!! USA Test Prep due Friday.

2. Standards SPS6. Students will investigate the properties of solutions.
d. Compare and contrast the components and properties of acids and bases.
e. Determine whether common household substances are acidic, basic, or neutral.

3. Returned Work Chemical Reactions Test Chembalancer
Chemical Reactions Lab

11. What is pH? 7 14 Increasingly acidic Increasingly basic
pH stands for “power of Hydrogen”
pH is a scale to indicate how acidic or basic a liquid is
It is related to the percentage of hydrogen ions (H+) in a substance
The pH scale ranges from 0, highly acidic, to 14, highly basic
A substance of a pH of 7 is neutral, neither acidic nor basic 7 14
Increasingly acidic
Increasingly basic
© Charmagne Quenan 2016

12. What Are Acids and Bases
Donate H+
Have a pH less than 7
Have a sour taste
Feel astringent (drying)
Common examples include sulfuric acid and hydrochloric acid
Bases:
Accept H+
Have a pH greater than 7
Can have a bitter taste
Feel slippery
Common examples include ammonia and sodium hydroxide
Both can be corrosive and can conduct electricity – both can be dangerous, and so touching and tasting aren’t the best way to test pH!
© Charmagne Quenan 2016

13. What is Litmus Paper? Litmus is a dye that comes from lichens
Blue litmus turns RED in an acid
It stays BLUE in a base
Red litmus turns BLUE in a base
It stays RED in an acid
© Charmagne Quenan 2016

14. Examples of Acids and Bases
Acids include:
Lemon juice
Vinegar
Citric acid
Ascorbic acid (vitamin C)
Hydrochloric acid
Carbonic acid
Bases include:
Soaps
Bleach
Ammonia
Baking soda
Lye
Drain cleaner
Calcium carbonate
© Charmagne Quenan 2016

15. November 15, 2016 Sit in your “new” seats
Take out your white lab packet
Make sure it is complete as groups review each center
Be sure to bring lab packet tomorrow for use during the quiz
You will turn it in after the quiz
NO HOMEWORK – Friday is the last chance for last week’s USA Test Prep
© Charmagne Quenan 2016