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histephenson007 said:ShootingStar said:Question!
Please explain
for question 9,
the answer is D
if in SO3 (Charge : -2) the oxidation number is +3.... when it changes into SO4 (still -2) there is an extra -2 charge due to the additional oxygen ion, but the final charge still remains (-2). So the Sulphur ion must've balanced the extra (-2) . So it must have +5 charge
The answer is B for question 9 and question 10 is D. Can you please explain how to work it out?