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November 23, 2014

November 23, 2014

Posted by **mary** on Tuesday, January 31, 2012 at 11:57pm.

pH values:

NaCl 6.89

NaC2H3O2 7.75

Na2CO3 11.20

Cu(NO3)3 4.73

NH4Cl 5.91

Zn(NO3)2 5.20

KAl(SO4)2 3.70

NaHCO3 8.82

- chemistry -
**DrBob222**, Wednesday, February 1, 2012 at 12:34amNaCl doesn't deviate more than 1 pH unit from 7.0.

Same for NaC2H3O2.

Hydrolysis of Co3^2- accounts for the higher pH.

CO3^2- + HOH ==> HCO3^- + OH^-

Hydrolysis of NH4Cl accounts for the lower pH.

NH4^+ + H2O ==> NH3 + H3O^+

etc.

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