Unit 3- The pH Scale

Question 0

What pH are acids?

Answer 0

Less than 7

Question 1

What is the pH scale?

Answer 1

A measure of pH ranging from below 0 to above 14

Question 2

What pH is alkali?

Answer 2

More than 7

Question 3

What pH is neutral solutions?

Answer 3

Equal to 7

Question 4

Non metal oxides dissolve in water to give what type of solution?

Answer 4

Acid solution

Question 5

Metal oxides and hydroxides dissolve in water to give what type of solution?

Answer 5

Alkaline solution

Question 6

What do metals produce when they burn in air?

Answer 6

Metal oxides

Question 7

What is another name for metal oxides?

Answer 7

Basic oxides

Question 8

What is produced when a metal oxide is dissolved in water?

Answer 8

Metal hydroxide

Question 9

What type of solutions are metal hydroxides?

Answer 9

Alkali

Question 10

What type of solution is it when ammonia dissolves in water?

Answer 10

Alkali

Question 11

Is ammonia gas insoluble or soluble?

Answer 11

Very soluble in water

Question 12

What does ammonia gas dissolve in water to form?

Answer 12

Alkali ammonium hydroxide

Question 13

What do non metals burn to produce?

Answer 13

Non metal oxides

Question 14

What type of solution is a non metal oxide?

Answer 14

Acidic

Question 15

When non metal oxides dissolve in water what type of solution is formed?

Answer 15

An acidic solution

Question 16

What is the formula for hydrochloric acid?

Answer 16

HCl

Question 17

What is the formula for nitric acid?

Answer 17

HNO3

Question 18

What is the formula for sulphuric acid?

Answer 18

H2SO4

Question 19

What is the formula for sodium hydroxide?

Answer 19

NaOH

Question 20

What is the formula for potassium hydroxide?

Answer 20

KOH

Question 21

What is the formula for calcium hydroxide?

Answer 21

Ca(OH)2

Question 22

What is the formula for ammonium hydroxide?

Answer 22

NH4OH

Question 23

What is the concentration of hydrogen ions and hydroxide ions in a water or aqueous solution?

Answer 23

Equal

Question 24

Why type of solution contains more hydrogen ions than hydroxide?

Answer 24

Acidic solution

Question 25

What type of solution contains more hydroxide ions than hydrogen ions?

Answer 25

An alkaline solution

Question 26

What happens to the pH of an acidic solution when it is diluted?

Answer 26

The pH moves towards 7 as the concentration if hydrogen ions decreases

Question 27

What happens the pH of an alkaline solution when it is diluted?

Answer 27

The pH moves down towards 7 as the concentration of hydroxide ions in the solution decreases

Question 28

What happens when a reversible reaction is in equilibrium?

Answer 28

The concentrations of the reactants and the products remain constant although not necessarily equal