Acids and Bases Physical Properties

Question 1

What is the formula of hydrochloric acid?

Answer 1

HCl

Question 2

What is the formula of sulfuric acid?

Answer 2

H2SO4

Question 3

What is the formula of nitric acid?

Answer 3

HNO3

Question 4

What pH range do acids have?

Answer 4

Less than 7

Question 5

What is the pH of neutral substances?

Answer 5

7

Question 6

What pH range do bases/alkalis have?

Answer 6

Greater than 7

Question 7

A strong acid has a pH range of what?

Answer 7

1-2

Question 8

What colour does universal indicator turn in strong acids?

Answer 8

Red

Question 9

A moderately string acid has a pH range of what?

Answer 9

3-5

Question 10

What colour does universal indicator turn in moderately strong acids?

Answer 10

Orange

Question 11

A weak acid has what pH?

Answer 11

6

Question 12

What colour does universal indicator turn in a weak acid?

Answer 12

Yellow

Question 13

What colour does a neutral substance turn universal indicator?

Answer 13

Green

Question 14

A weak base/alkali has what pH range?

Answer 14

8-9

Question 15

A moderately strong base/alkali has what pH range?

Answer 15

10-12

Question 16

What colour does universal indicator turn in weak and moderately strong bases/alkalis?

Answer 16

Blue

Question 17

A strong base/alkali has what pH range?

Answer 17

13-14

Question 18

What colour does universal indicator turn in string bases/alkalis?

Answer 18

Purple

Question 19

pH measures the strength of an acid or a base/alkali by detecting the concentration of what two ions?

Answer 19

Hydrogen (H+) and Hydroxide (OH-) ions

Question 20

Describe the concentration of ions in a strong acid.

Answer 20

High concentration of H+ and a low concentration of OH-

Question 21

Describe the concentration of ions in a moderately strong acid.

Answer 21

Concentration of H+ ions is still higher than the concentration of OH- ions

Question 22

Describe the concentration of ions in a neutral substance.

Answer 22

The concentration of H+ and OH- ions is equal

Question 23

What is formed when an H+ ion and and OH- ion combine?

Answer 23

H2O/Water

Question 24

Describe the concentration of ions in weak and moderately strong bases/alkalis.

Answer 24

The concentration of OH- ions is higher than H+ ions

Question 25

Describe the concentration of ions in strong bases/alkalis.

Answer 25

The concentration of OH- ions is high and H+ is low

Question 26

What colour does red and blue litmus turn in acids?

Answer 26

Red litmus stays red and blue litmus turns red

Question 27

What colour does red and blue litmus turn in bases?

Answer 27

Red litmus turns blue and blue litmus stays blue

Question 28

What colour does red and blue litmus turn in neutral substances?

Answer 28

Red litmus stays red and blue litmus stays blue

Question 29

Why is universal indicator a better indicator than litmus?

Answer 29

Universal indicator tells you the strength of the acid or base but litmus only tells you if it is an acid or base regardless of the strength.

Question 30

Bases are ionic compounds that end in what four negative ion names?

Answer 30

Oxides, Hydroxides, Carbonates and Hydrogen Carbonates