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Write equaitons to explain why the follo...

Write equaitons to explain why the following species act as weak bases in water solution.
i. `CH_(3)NH_(2)` ii. `NO_(2)^(Θ)` iii. `HPO_(4)^(2-)` iv. `CHO_(2)^(Θ)`

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All of them given `overset(Θ)OH` ions in aquepus solutions.
i. `CH_(3)NH_(2) + H_(2)O rarr CH_(3)overset(o+)NH_(3) + overset(Θ)OH`
ii. `NO_(2)^(Θ) +H_(2)O rarr HNO_(3) + overset(Θ)OH`
iii. `HPO_(4)^(2-) + H_(2)O rarr H_(2)PO_(4)^(Θ) + overset(Θ)OH`
`H_(2)PO_(4)^(2-) + H_(2)O rarr H_(3)PO_(4) + overset(Θ)OH`
iv. `HCOO^(Θ) + H_(2)O rarr HCOOH + overset(Θ)OH`
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