Acids, Bases and Indicators

1

What is a base?

A A substance that produces hydrogen ions in water B A substance that produces hydroxide ions in water C A substance that is always solid D A substance that is always liquid

2

What is the pH of blood?

A 1 B 7.4 C 10 D 12

3

What is the color of litmus paper in an acid?

A Blue B Red C Green D Purple

4

What is the reaction between an acid and a base called?

A Neutralization B Combustion C Oxidation D Reduction

5

What is the pH range of an acid?

A 0 to 6 B 7 C 8 to 14 D 14

6

What is the chemical formula for phosphoric acid?

A H3PO4 B H2PO4 C HPO4 D H3PO3

7

What is the chemical formula for potassium hydroxide?

A KOH B KCl C K2CO3 D KHCO3

8

What is the pH range of a base?

A 0 to 6 B 7 C 8 to 14 D 0 to 14

9

What is the color of phenolphthalein in a base?

A Colorless B Pink C Blue D Red

10

What is the pH of a solution with a concentration of hydrogen ions equal to 10^-7?

A 0 B 7 C 10 D 14

11

Which of the following is a weak acid?

A Hydrochloric acid B Sulfuric acid C Acetic acid D Nitric acid

12

What is the pH of a solution that has equal concentrations of hydrogen ions and hydroxide ions?

A 0 B 7 C 10 D 14

13

What is the pH of pure water?

A 0 B 7 C 10 D 14

14

What is the chemical formula for carbonic acid?

A HCl B H2SO4 C HNO3 D H2CO3

15

What is the chemical formula for sodium hydroxide?

A NaOH B NaCl C Na2CO3 D NaHCO3

16

What is an acid?

A A substance that produces hydrogen ions in water B A substance that produces hydroxide ions in water C A substance that is always solid D A substance that is always liquid

17

What is the color of phenolphthalein in an acid?

A Colorless B Pink C Blue D Red

18

What is the color of litmus paper in a base?

A Blue B Red C Green D Yellow

19

What is the pH of a solution that is strongly acidic?

A 0 to 3 B 4 to 6 C 8 to 10 D 12 to 14

20

What is the chemical formula for nitric acid?

A HCl B H2SO4 C HNO3 D H2CO3

21

Which indicator is colorless in acid and pink in base?

A Litmus paper B Phenolphthalein C Methyl orange D Turmeric

22

What is the pH of baking soda solution?

A About 2 B About 7 C About 8.5 D About 14

23

Which of the following is a natural indicator?

A Litmus paper B Phenolphthalein C Turmeric D Methyl orange

24

What is the pH of seawater?

A 1 B 7 C 8.1 D 12

25

What is the color of turmeric in an acid?

A Yellow B Red C Blue D Purple