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Calculation of weak base and strong acid salt hydrolysis

 Last Update: 2021-06-18
 Source: Internet
 Author: User

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acid base neutralization

lps generation 3

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2.
Weak base and strong acid salt

NH2 _{.
4} CI strong acid salt of a weak base, completely dissociates in water to generate NH2 _{.
4}⁺ and CI ^-
.

NH ₄⁺ and H ₂ O undergo a hydrolysis reaction, and the aqueous solution is acidic

When c0≥400Kh ^Θ , it can be solved approximately

The degree of hydrolysis is

Hydrolysis of acid salt

Polycarboxylic acid salt of a weak acid hydrolysis process generally more complex, in this order NaHC03 _.

3
as an example for discussion, a solution of NaHC03 _{.
3} completely dissociated generation of Na ⁺ and HC03 _{.

After neutralizing H+
[OH ^- ] = [H ₂ CO.

'S _{.

The HC03 _{.
3}^- dissociation reaction to give
also because
Substituting [CO ²₃ ] and [H ₂ CO ₃ ] into the formula [OH ^- ]=[H ₂ CO ₃ ]-[CO ²_3- ], there is
Organize, get
Since Ka2 ^[Theta] and Kh2 ^[Theta] are very small, i.

e.
[HC03 _{.
3}^- ] c≈0, there

When c0Ka ^[Theta] >> Kw ^[Theta] when
Then the degree of hydrolysis is
For example, in 0.

10 mol·dm ^-3 NaHCO ₃ solution}}

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