Ph and indicators

Question 1

Colour of Methyl orange in Acid, Neutral, Alkali

Answer 1

Red, yellow, yellow

Question 2

Colour of Phenolphthalein in Acid, Neutral, Alkali

Answer 2

Colourless, colourless, pink

Question 3

Colour of Red litmus in Acid, Neutral, Alkali

Answer 3

Red red blue

Question 4

Colour of Blue Litmus in Acid, Neutral, Alkali

Answer 4

Red blue blue

Question 5

How do you know that two solutions with different pHs would give a neutral solution

Answer 5

If the pHs are equidistant from pH7
Eg. pH2 and pH12

Question 6

4 most abundant gases in air

Answer 6

Nitrogen - 78%
Oxygen - 21%
Argon - 0.96%
Carbon Dioxide - 0.04%

Question 7

During combustion metals form

Answer 7

metal oxides

Question 8

During combustion common non-metals form

Answer 8

non-metal dioxides

Question 9

What can you observe when Magnesium reacts with oxygen

Answer 9

Bright white light with a white powder formed

Question 10

what pH are non-metals

Answer 10

acidic

Question 11

What can you observe when sulphur reacts with oxygen

Answer 11

blue flame

Question 12

What is an acid

Answer 12

H+ ion or proton donor

Question 13

What is an alkali

Answer 13

OH- ion donor

Question 14

Common bases

Answer 14

All metal oxides and hydroxides
Ammonium oxides and hydroxides

Question 15

Formula for Hydrochloric acid

Answer 15

HCl -

Question 16

Formula for Sulfuric acid

Answer 16

H2SO4 2-

Question 17

Formula for Nitric acid

Answer 17

HNO3 -

Question 18

Formula for Phosphuric Acid

Answer 18

H3PO4 3-

Question 19

What pH do all salts have

Answer 19

neutral

Question 20

Formula for Hydrobromic acid

Answer 20

HBr -

Question 21

Acid and metal general equation

Answer 21

Acid + metal -> salt + hydrogen

Question 22

Acid + alkali (or base) general equation

Answer 22

Acid + alkali -> Salt + water

Question 23

How are bases and alkalis different

Answer 23

Alkalis are soluble bases

Question 24

Acid + carbonates general equation

Answer 24

Acid + carbonate -> salt + water + carbon dioxide

Question 25

What is metallic bonding

Answer 25

the electrostatic force of attraction between positive metal ions and a delocalised sea of electrons

Question 26

What is ionic bonding

Answer 26

the electrostatic force of oppositely charged ions

Question 27

What is the Giant Metallic Structure like

Answer 27

Positive ions in formation
For a group one metal: same number of electrons than ions
for a group three metal: three times the number of electrons than ions