Acids

Question 1

what’s a strong alkali/acid

Answer 1

fully dissociates OH-/H+ ions in aqueous solution

Question 2

what’s a weak alkali/ acid

Answer 2

partially dissociates OH-/H+ ions in solution

Question 3

the reaction between an acid and a base is

Answer 3

neutralisation, forms salt and water

Question 4

bases are normally…

Answer 4

metal oxides, hydroxides or carbonates

Question 5

acid + metal oxide/hydroxide –>

Answer 5

salt + water

Question 6

acid + metal carbonate –>

Answer 6

salt + water + carbon dioxide

Question 7

what are acid- base titrations used for

Answer 7

used to determine the conc of a solution by neutralisation it with a standard solution

Question 8

what’s a standard solution

Answer 8

a solution of known concentration

Question 9

define amphoteric

Answer 9

can act as an acid or a base

Question 10

define end point

Answer 10

when 2 solutions have reacted causing the indicator to change colour

Question 11

define equivalence point

Answer 11

when acid has been neutralised exactly by alkali

Question 12

equation for percentage uncertainty

Answer 12

uncertainty (x no of values measured)/measured value x 100
uncertainty = resolution/2 x no of times used