ACIDS AND BASES

 TOPIC 8 -ACIDS AND BASES 

1. What is pH?

2. How do you measure pH?

3. What is the scale pH is measured on?

4. What pH level does water have? Is water acidic, basic, or neutral?

5. What is the most acidic pH level?

6. What is the most basic pH level?

1. In chemistry, pH is a scale used to specify the acidity or basicity of an aqueous solution

2. The pH value can be measured using electrochemical measuring systems, litmus paper, or indicators and colorimeters. 

3. pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. 

4. The most alkaline substances, such as lye, have a pH of 14.

5. The scale has values ranging from zero (the most acidic) to 14 (the most basic). 

14 - (answer) 

Atom- simplest form of matter p- H = e - n = n - no  7=7e 7pt 7e= le

+1 (GE) ions charges atoms 

Acids -  have hydrogen ions

           H+

Bases- have hydroxide ion S0H- 

Equipments you need:

Well Plate 

pH strips/;litmus paper 

pH chart/table (1 to 14)

Dropper

Products:

Baking soda 

Distilled water

Window cleaner

Toilet bowl cleaner

Lemon Juice 

Milk

Orange juice 

Apple juice 

Vinegar

Detergent

Tea/Coffee 

Substance	Acid/Base (Prediction	Colour changes from? (Litmus paper)	Result (Acid/Base)
Orange Juice	Purple	Red
Apple Juice	Pink
Vinegar	Blue
Milk	Red	Purple
Tea/Coffee	Blue
Destergent	Green
Lemon Juice	Blue
Water	Red
Toilet Cleaner	Purple
Baking Soda	Brown
Window Cleaner	Brown

ACIDS

Blue - Red

Red - Red   ( no effect)

In tech we learned about Acids and Bases. It was very hard.