Chapter 2. Worksheet #2-3(Electrolytes)

Question 1

What is an electrolyte?

Answer 1

A substance that when dissolved in water allows an electrical current to flow through it

Question 2

What is electrical conductivity?

Answer 2

How well a substance allows electricity to flow through it

Question 3

What is electrolytic dissociation?

Answer 3

Separation of a dissolved compound into 2 ions of opposite charge

Question 4

What is the chemical equation of electrolytic dissociation?

Answer 4

NaCl=>h20=>Na+Cl-

Question 5

Is electrolytic dissociation a physical or chemical change? Why?

Answer 5

Physical because the solute’s properties are retained and the solute can be brought back by evaporation

Question 6

If a solution has a pH of

Answer 6

Acidic

Question 7

Blue litmus paper changes to red if the solution is…

Answer 7

Acidic

Question 8

Acids contain…

Answer 8

hydrogen and nonmetals

Question 9

What are some exceptions to acids?

Answer 9

“COOH” acids

Question 10

If a solution has a pH of >7, it is…

Answer 10

Basic

Question 11

Red litmus paper changes to blue if the solution is…

Answer 11

Basic

Question 12

Bases contain…

Answer 12

metals and hydroxide ions

Question 13

What are some exceptions to bases?

Answer 13

Anything with a CH is not a base

Question 14

Salts contain…

Answer 14

a metal and nonmetal

Question 15

Salts release…

Answer 15

positive and negative ions

Question 16

What is a difference of 1 unit of the pH scale represent?

Answer 16

A difference of 10

Question 17

What are indicators used to determine?

Answer 17

The type of electrolyte

Question 18

What is the turning point in an indicator?

Answer 18

The point where a consistent colour changes