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jiangyg06

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ÉÏÊöµÄKw0µÄÊýֵΪ: Kw0 = 1.0 * 10 -14
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yangxiaohai

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ÖªµÀHFµÄKa°É£¿ÄÇô¾ÍÊÇKbÁË¡£Ka.Kb=Kw
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jiangyg06

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NH4+ + F- + H2O = NH3.H20 + HF

K0= Kw0/ (Ka0 * Kb0)

NH3.H2O, Kb0=1.8 * 10-5
HF, Ka0= 3.53 * 10-4, ¾ßÌåÊýÖµ£¬Çë²Î¿¼²ÜÎýÕ£¬ËÎÌìÓÓ£¬¡¶ÎÞ»ú»¯Ñ§¡·£¬¸ßµÈ½ÌÓý³ö°æÉ磬1998Äê.


ÈõËáÈõ¼îÑεÄ[H+]:
[H+] = SQRT £¨¿ªÆ½·½£©{kW0*kA0* [NH4+]/ (Kb0 * (Ka0+ [F-]))}

ÀýÈ磬 0.1 mol/LµÄNH4FµÄ[H+]=4.4 * 10 -7 mol/L,
pH=6.35
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