Answer:
pH = 1.348
Explanation:
- H2SO3 + H20 ↔ H3O+ + HSO3-
∴ Ka1 = 1.7 E-2 = ( [ H3O+ ] * [ HSO3- ] ) / [ H2SO3 ]
∴ <em>C </em>H2SO3 (aq) = 0.163 M
- HSO3- + H2O ↔ H3O+ + SO32-
∴ Ka2 = 6.4 E-8 = ( [ H3O+ ] * [ SO32- ] ) / [ HSO3- ]
∴ Kw = 1 E-14 = [ H3O+ ] * [ OH- ]
since Ka1 >>> Ka2 ( difference between the constants is greater than the order of E3 ); then the most importan equilibrium is Ka1 and we can assume that [ SO32- ] <<< [ HSO3- ]
mass balance:
⇒ <em>C </em>H2SO3 = 0.163 = [ H2SO3 ] + [ HSO3- ]......(1)
charge balance:
⇒ [ H3O+ ] = [ HSO3- ]...........(2) where [ OH- ] and [ SO32- ] is neglected. the first comes from water and the second comes from Ka2.
(2) in (1):
⇒ [ H2SO3 ] = 0.163 - [ H3O+ ]......(3)
(2) and (3) in Ka1:
⇒ 1.7 E-2 = [ H3O+ ]² / ( 0.163 - [ H3O+ ] )
⇒ [ H3O+ ]² + 1.7 E-2 [ H3O+ ] - 2.771 E-3 = 0
⇒[ H3O+ ] = 0.045 M
⇒ pH = - Log [ H3O+ ] = - Log ( 0.045 )
⇒ pH = 1.348
Answer: Advances future technology
Explanation:
Science has led us to finding out things that give us what we have today. .
2 HClO(aq) + Ca(OH)2(aq) = 2 H2O(l) + Ca(ClO)2(aq) is the balanced equation
Since the compound is 72.2% Mg then there would be 27.8% N. Then you can just change it to 72.2 g Mg and 27.8 g N.
then convert to moles by dividing by molecular mass.
72.2÷24.31=2.96 moles Mg
27.8÷14.01=1.98 moles N
then divided by the lowest number.
2.96÷1.98=1.5
Since it is 1.5 you multiply by 2. so you have 3 Mg
1.98÷1.98=1 N
so the empirical formula is Mg3N
Scientific law = Describe what phenomena happen , Theory = Explains why phenomena occur