Acids, Bases + Neutrals

Question 1

What are acids , bases + neutrals (3)

Answer 1

• make up great part of our daily lives + found everywhere
• Tasting is best way to determine
• dangerous to taste everything

Question 2

What are indicators (1)

Answer 2

Indicators indicate weather a substance is an acid, base or a neutral.

Question 3

What is litmus (3)

Answer 3

• Litmus is the most common indicator
• it originated from a certain fungus
• you use strips of paper called litmus paper

Question 4

What is litmus paper (5)

Answer 4

• have red and blue litmus paper
• if the red turns blue = base
• if the blue turns red = acid
• it’s important to test both, if the red is blue and the blue stays blue it’s a base
• if the red stays red and blue stays blue it’s a neutral

Question 5

What is pH (2)

Answer 5

• pH stands for power of hydrogen

- it’s the consentration of hydrogen particles

Question 6

What is the pH scale (6)

Answer 6

• it indicates hiw strong an acid or base is
• the scale ranges from 0-14
• The lower on the scale, the more acidic
• if its lower like 1 (battery acid) its very acidic
• if it’s higher like 13 (oven cleaner) it’s a strong base
• if the ph is 7 it’s a neutral

Question 7

Give e.g. of acids (3)

Answer 7

• lemon juice
• vinigar
• stomach acids

Question 8

Discuss the properties of an acid (3)

Answer 8

-The taste is sour
 •shouldn’t taste everything 
- The texture is course 
 •don’t rube everything can damage your skin
- Can cause corrosion

Question 9

Give e.g. of bases (3)

Answer 9

• oven cleaner
• toothpaste
• cleaning substances

Question 10

Discuss the properties of a base (4)

Answer 10

-The taste is bitter
- The texture is slippery
•when you rub it it is smooth and soapy
-Can cause oxidation

Question 11

Discuss neutrals (6)

Answer 11

-Neutrals have a pH of 7
•e.g. water
•cooking oil
•sugar/salt solutions
-acids + bases can neutralize eachother if mixed at the right ratio
- e.g. toothpaste (base) neutralizes the acids in your mouth from food

Question 12

What is a compound (4)

Answer 12

• 2/+ substances that are chemically bound
• have their own unique properties [ not those of the original substances ]
• can be broken down with chemical reactions
• but not to always to original substances