Acids And Bases

Question 0

Common laboratory acid (weak)

Answer 0

Citric acid

Question 1

Common laboratory acid (strong)

Answer 1

Hydrochloric acid HCL

Question 2

Properties of acids

Answer 2

• corrosive concentrated
• will “attack” metals, skin and fabric
• sour taste
• contain hydrogen ions H+

Question 3

What does H+ mean?

Answer 3

The amount of this determines the strength “attack” level

Question 4

Common laboratory base (strong)

Answer 4

Calcium hydroxide CaOH2

Question 5

Common laboratory base (weak)

Answer 5

Soaps

Question 6

Properties of bases

Answer 6

• feel soapy
• when concentrated they burn flesh
• contain OH ion

Question 7

Strong and weak acids:

Answer 7

• when the acid is strong that means that’s each acid molecule will react strongly
• lab acids are all strong
• weak acids, even if a big amount or concentrated will not have a harmful effect

Question 8

Concentration means:

Answer 8

Concentration means how many molecules are mixed with water

Question 9

Dilute means:

Answer 9

Solutions have a lot of acid/base molecules and only a few acid molecules

Question 10

Concentrated means:

Answer 10

Solutions have a lot of acid/base molecules and only a few water molecules

Question 11

PH scale:

Answer 11

Determines if the solution is acidic or basic, If the solution is greater than 7 it is basic. If it’s less it’s acidic

Question 12

Universal indicator:

Answer 12

• Shows colour changes for each step on the PH scale
• goes between strong acid to strong base
• math linked to the concentrated to H+ ions

Question 13

Neutralisation:

Answer 13

When an acid and base react together they make water and salt

Question 14

Neutral word equation :

Answer 14

Acid+base > water+salt

ACID
HCI+NaOH > H2O NaCI

(Hydrochloric, nitric, sulphuric)

Question 15

Neutralisation word equation:

Answer 15

Acid+base > water+salt
BASE
"Metal" 
- chloride 
- nitrate 
- sulphate

Question 16

Metals and acids: + word equation

• when acid and metal react, hydrogen gas and “salt” is made.

Answer 16

Acid+metal > hydrogen gas+salt

2HCI+Mg > H2+MgCI2

Question 17

More reactions of metals and acids

Answer 17

Iron and sulphuric acid > hydrogen gas+ iron sulphate

Calcium and nitric acid > hydrogen gas+calcium nitrate

Question 18

Acids and carbonates word equation

Answer 18

Acid+carbonate > carbon dioxide+water+salt

2HCI+Na2CO3 > CO2+H2O+NaCI

Question 19

Acids and carbonates example

Answer 19

2HCL + Na2 CO3 = CO2 + H2O + NaCl

Hydro.Acid+Nitric acid = carbon diox.+ sulphuric acid

Question 20

Acid and base word equation example

Answer 20

HCL + NaOH = H2O + NaCL

Hydro.acid+Nit.acid = Water+sulphuric acid

Question 21

Acid and metal word equation. Example

Answer 21

2HCL + Mg = H2 + MgCL2

Hydro.acid+Magnesium = Hydro.gas+magnesium chloride

Question 22

Ion is?

Answer 22

Electrically charged atom or group of atoms

Question 23

Compound?

Answer 23

Composed if one or more atoms

Question 24

+ Concentrated means? +

Answer 24

+Treated to reduce inessential ingredients +

Question 25

Ph ???

Answer 25

A blue colouring matter that reacts with both acid and base

Question 26

Define concentration:

Answer 26

Solutions have only a few water molecules with a lot of acids/base molecules

Question 27

Define dilute:

Answer 27

Solutions have a lot of water molecules and a few acid/base molecules