C4 Flashcards
which of these PH’s are acid alkali or neutral 9,2,7,6
9 alkali,2 acid,7 neutral,6 alkali
general word equation between an acid and a base
acid + base —> salt + water
what type of reagent could be used to show that an acid or base has been completely neutralised
an indicator
what is a strong acid
strong acids ionise completely in water.
is zinc more or less reactive then iron
more reactive
what is the general word equation for the reaction of metal with an acid
acid + metal —-> salt + hydrogen
what product forms in the oxidation of magnesium by oxygen
magnesium oxide
explain how you decide whether a metal can be extracted from its oxide by reduction with carbon.
if it is lower then carbon on the reactivity series.
in terms of electrons give the definition of of oxidation.
oxidation is a loss of electrons.
in a displacement reaction does the metal atom get reduced or oxidised.
oxidised
in electrolysis which electrode are the positive ions attracted to.
cathode (negative)
why can ionic solids not undergo electrolysis
the ions are in fixed positions and cant move
do ions get reduced or oxidised at the anode
oxidised
during the manufacturing of aluminium from bauxite, which electrode is aluminium formed at
cathode
