Acids, Alkalines And Bases

Question 1

What colour does litmus go when acid and alkali react with it

Answer 1

Pink (acid)

Blue(alkaline)

Question 2

What colour does phenolphthalein go when acid and alkali react with it

Answer 2

Acid colourless

Alkali fuscha pink

Question 3

What colour does methyl orange go when acid and alkali react with it

Answer 3

Acid red

Alkaline yellow

Question 4

What is the chemical formula of hydrochloride acid

Answer 4

HCl

Question 5

What is the chemical formula for sulfuric acid

Answer 5

H2SO4

Question 6

What is the chemical formula for nitric acid

Answer 6

HNO3(charge of -1)

Question 7

What is the definition of an indicator

Answer 7

An indicator is a substance that is one colour when in acid and goes a different colour when dropped in alkaline

Question 8

What is the definition of pH

Answer 8

PH is a number scale that shows how acidic or alkaline a solution is

Question 9

What is the scale of acid

Answer 9

123456

Question 10

What is the number for neutral

Answer 10

7

Question 11

What is the scale of numbers for alkaline

Answer 11

8,9,10,11,12,13,14

Question 12

What colour does a solution go in a universal indicator with a pH 0,1,2

Answer 12

Red

Question 13

What colour does a solution go in a universal indicator with a pH 3,4,5

Answer 13

Orange

Question 14

What colour does a solution go in a universal indicator with a pH 5,6

Answer 14

Yellow

Question 15

What colour does a solution go in a universal indicator with a pH 7

Answer 15

Green

Question 16

What colour does a solution go in a universal indicator with a pH 8,9

Answer 16

Blue/green

Question 17

What colour does a solution go in a universal indicator with a pH 10,11

Answer 17

Blue

Question 18

What colour does a solution go in a universal indicator with a pH 12,13,14

Answer 18

Purple

Question 19

What is the definition of a base

Answer 19

A base is any metal oxide/hydroxide

Question 20

Are metal bases soluble in water

Answer 20

No

Question 21

What are the exceptions called with the metal oxides that are soluble in water

Answer 21

Alkalis

Question 22

What is the definition of a salt

Answer 22

A salt is the compound formed when the hydrogen ions get replace by metal ions or ammonium ions

Question 23

Where in the reactivity series do metals stop reacting with acid

Answer 23

Metal below hydrogen

Question 24

What is the general word equation for acid +metal

Answer 24

Acid + metal goes to salt + hydrogen

Question 25

How many nitrates are soluble

Answer 25

All of them

Question 26

What are the exceptions of all the chlorides being soluble

Answer 26

Silver chloride and lead(ii)chloride

Question 27

What are the exceptions of the sulfates being soluble in water

Answer 27

Barium sulfate Lead(ii)sulfate Calcium sulfate

Question 28

How many metals are insoluble when used to make salts

Answer 28

All of them

Question 29

How many bases are insoluble when used to make salts

Answer 29

All except for group 1 and 2 (ca downwards) and ammonia

Question 30

How many carbonates are insoluble when used to make salts

Answer 30

All except group 1 and ammonia