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)

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table? atom p has an estimated zeff of 7 and is therefore to the left of atom q, which has a zeff of 6. atom p has an estimated zeff of 7 and is therefore to the right of atom q, which has a zeff of 6. atom p has an estimated zeff of 5 and is therefore below atom q, which has a zeff of 4. atom p has an estimated zeff of 5 and is therefore above atom q, which has a zeff of 4.