Question

диссоциация в ионом виде 
H2S03

Answer 1

H2SO3--->HSO3
HSO3--->SO3
________
H2SO3----->(2H+) + SO3(2-)

Answer 2

$H_{2}SO_{3}=H^{+} + HSO_{3}^{-} ( alpha_{1} <<1)$
$HSO_{3}^{-}=H^{+} + SO_{3}^{2-} ( alpha _{2} < alpha _{1})$