2] [2]
m
(e) The sulfur dioxide content of wine is most commonly measured by the Ripper Method which
involves titration with iodine in the presence of starch as an indicator.
SO2(aq) + 12(aq) + 2H2O(1) ► 21-(aq) + S0,2-(aq) + 4H+ (aq)
A 50.0 cm sample of wine required 12.35 cm of 0.010 moldm- (aq) for complete reaction
with the Soz
of
(i) How many moles of So, are present in 50.0 cm of wine?
[1]
moles of So, in 50.0 cm =
(ii) How many moles of So, are present in 1 dm of wine?
moles of So, in 1 dm =
[1]
(iii) How many milligrams, mg, of So, are present in 1 dm of wine? Give your answer to three
significant figures. (19 = 1000 mg)