8.1 Theories & Reactions of Acids & Bases

   Brønsted–Lowry base: ....................

   Brønsted–Lowry acid:  ....................

[2]

HCO₃^– (aq) + H₂O (l) $\rightleftharpoons$ H₂CO₃ (aq) + OH^– (aq)
HCO₃^– (aq) + H₂O (l)  CO₃^2– (aq) + H₃O⁺ (aq)

   Identify two different amphiprotic species in the above reactions.

[1]

d)

i)        State what is meant by the term conjugate base.

[1]

ii)       State the conjugate base of the hydroxide ion, OH^– 

[1]

i)        State the type of reaction that takes place.

[1]

ii)       State the formula of the products of the reaction.

[1]

iii)      State the sign of the enthalpy change for this reaction.

[1]

d)      Write the formulae for the following:

i)   Carbonic acid.  [1]

ii)   Ammonium sulfate.  [1]

iii)   Magnesium ethanoate.  [1]