C5 : chemical changes

Question 1

name the most reactive element in the reactivity series

Answer 1

potassium

Question 2

what is the least reactive element on the reactivity series?

Answer 2

gold

Question 3

name the mneumonic for the reactivity series
p-
s-
l-
c-
m-
a-
z-
i-
l-
h-
c-
s-
g-

Answer 3

please
send
lions
cats
monkeys
and
zebras
into
lovely
hot
countries
signed
general

Question 4

whats the order of the reactivity series

Answer 4

potassium
sodium
lithium
calcium
magnesium
aluminium
zinc
iron
hydrogen
copper
silver
gold

Question 5

when comparing metals what do you do to make it a fair test

Answer 5

same mass/concentration/surface area

Question 6

metal +acid become

Answer 6

salt + Hydeogen2
an example of simple displacement

Question 7

metal + water

Answer 7

metal hydorxide + H2

Question 8

acid+ carbonates

Answer 8

salt + water + carbon dioxide

Question 9

acid + hydroxides (alkaline)

Answer 9

salt + water

Question 10

what is a strong acid

Answer 10

fully ionises in an aqueous solution

Question 11

how do you know something is in excess

Answer 11

when it stops disappearing

Question 12

what does the ph of an acid depend on

Answer 12

concentration of hydrogen ions
the higher the concentration of hydrogen the lower the ph is

Question 13

what does a stronger acid mean

Answer 13

greater the ionnisation
lower ph

Question 14

what does an increase concentration mean for an acid

Answer 14

higher concentration of acid the more acid in the same volume of solution
lower ph

Question 15

why can a aqueous solution conduct

Answer 15

ions are free to move