Acids and Bases

Question 1

What is the electron arrangement cap for each electron layer?

Answer 1

2,8,8,-

Question 2

Na loses 1 electron to gain a full outer valence shell. What charge does this Sodium ion have now?

Answer 2

Positive, Na^+

Question 3

The ion Lithium (Li^+) has a positive charge. What is the name of it’s ion?

Answer 3

Cation

Question 4

The Sulfur ion (S^-) has a negative charge. What is the name of its ion?

Answer 4

Anion

Question 5

Oxygen adds two electrons to form a oxygen ion. What is the symbol for an oxygen ion?

Answer 5

O^2-

Question 6

Formula for Hydrogen chloride

Answer 6

HCl

Question 7

Formula Copper oxide

Answer 7

CuO

Question 7

Lithium oxide

Answer 7

Li^2O

Question 7

Magnesium chloride

Answer 7

MgCl^2

Question 8

Sulfate ion

Answer 8

SO4^2-

Question 9

Carbonate ion

Answer 9

CO3^2-

Question 10

Hydroxide ion

Answer 10

OH^-

Question 11

Nitrate ion

Answer 11

NO3^-

Question 12

Magnesium carbonate

Answer 12

MgCO3

Question 13

Sodium Sulfate

Answer 13

Na2SO4

Question 14

Lithium carbonate

Answer 14

Li2CO3

Question 15

Magnesium Hydroxide

Answer 15

Mg(OH)2

Question 16

What colour does red litimus paper turn when in contact with an acid?

Answer 16

Red

Question 17

What colour does red litimus paper turn when in contact with a base?

Answer 17

blue

Question 18

What colour does blue litimus paper turn when in contact with an acid?

Answer 18

Red

Question 19

What colour does red litimus paper turn when in contact with a base?

Answer 19

Blue

Question 20

Any substance above the pH level 7 is concidered…

Answer 20

Bases (alkalines)

Question 21

Any substance below the pH level 7 is concidered…

Answer 21

Acids

Question 22

Any substance at the pH level 7 is concidered…

Answer 22

neutral

Question 23

What colour does the universal indicator turn when in contact with water (neutral)?

Answer 23

green

Question 24

What colour does the universal indicator turn when in contact with acids?

Answer 24

orange/red/yellow

Question 25

What colour does the universal indicator turn when in contact with alkaines?

Answer 25

blue/purple

Question 26

When the universal indicator turns red, this shows that there are more ___ ions than ___ ions

Answer 26

There are more hydrogen ions than hydroxide ions.

Question 27

When the universal indicator turns blue, this shows that there are more ___ ions than ___ ions

Answer 27

There are more hydroxide ions than hydrogen ions.

Question 28

When the universal indicator turns green, this shows that...

Answer 28

there is a equal amount of hydroxide and hydrogen ions.

Question 29

A swimming pool as a pH level of 8. Do you add water, acids and alkalines to make the soloution neutral?

Answer 29

Acids, because the soloution now is basic (pH level 7-14) and we need acids which has a lower pH level (pH level 0-6) to balance the average pH level out.

Question 30

A soloution was tested with red litimus paper and the paper stayed red. We can assume that the soloution must be acidic. Is this true?

Answer 30

No, because red litimus paper stays red when in contact with both acids and neutral soloutions. This means that the soloution could be either. You need to test it with blue litimus paper/univeral indicator to determine its components.

Question 31

Complete the word equation: hydrochloric acid + magnesium hydroxie --->

Answer 31

magnesium chloride + water

Question 32

potassium oxide + nitric acid --->

Answer 32

potassium nitrate + water

Question 33

nitric acid + anything =

Answer 33

anything nitrate + water

Question 34

hydrochloic acid + anything =

Answer 34

anything chloride + water

Question 35

sulfuric acid + anything =

Answer 35

anything sulfate+ water

Question 36

calcium oxide + hydrochloric acid --->

Answer 36

calcium chloride + water

Question 37

Cleaning/disinfectant are usually of a basic/acidic/neutral level

Answer 37

basic

Question 38

Describe the properties of a base

Answer 38

- feel soapy and slippery - conduct electricity when dissolved in water - taste bitter

Question 39

Describe the properties of an acid

Answer 39

- conduct electricity - taste acidic - react with metal to create hydrogen gas

Question 40

What group metals are insolouble in water?

Answer 40

Group 1 hydroxides, oxides and cabonates, but the hydroxides, oxides and carbonates of other groups are solouble in water.