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10 Nov 2019
Determination of the pH of a SaltSolution
Solutions
pH
[H30+]
[OH-]
1.0 M NaCl
6.6
2.51x10-7
3.90x10-8
1.0 MNaC2H3O2
8.0
1x10-8
1x10-6
1.0 M NaHSO4
1.7
1.99x10-12
5.01x10-13
1.0 M Na2CO3
11.5
3.16x10-12
3.16x10-3
1.0 M NH4CL
4.3
5.01x10-5
1.99x10-10
1.0 MNH4C2H3O2
7.4
3.90x10-8
2.51x10-7
Part 2
Solute
Chemical equation
Expression for Kb orKa
Value of Kb or Ka
NaC2H3O2
C2H3O2-+H2O->C2H3O2H+OH-
[C2H3O2H][OH-]/
[C2H3O2-]
?????
Na2SO4
?????
NaHSO4
HSO4-+H2O->H3O++SO42-
[SO42-][H3O+]/
[ HSO4-]
?????
Na2CO3
CO32-+H2O->HCO3-+OH-
[HCO3-][OH-]/[CO32-]
?????
NH4CL
NH4++H2O->NH3+H3O+
[NH3][H3O+]/[NH4+]
?????
Determination of the pH of a SaltSolution | |||
Solutions | pH | [H30+] | [OH-] |
1.0 M NaCl | 6.6 | 2.51x10-7 | 3.90x10-8 |
1.0 MNaC2H3O2 | 8.0 | 1x10-8 | 1x10-6 |
1.0 M NaHSO4 | 1.7 | 1.99x10-12 | 5.01x10-13 |
1.0 M Na2CO3 | 11.5 | 3.16x10-12 | 3.16x10-3 |
1.0 M NH4CL | 4.3 | 5.01x10-5 | 1.99x10-10 |
1.0 MNH4C2H3O2 | 7.4 | 3.90x10-8 | 2.51x10-7 |
Part 2 | |||
Solute | Chemical equation | Expression for Kb orKa | Value of Kb or Ka |
NaC2H3O2 | C2H3O2-+H2O->C2H3O2H+OH- | [C2H3O2H][OH-]/ [C2H3O2-] | ????? |
Na2SO4 | ????? | ||
NaHSO4 | HSO4-+H2O->H3O++SO42- | [SO42-][H3O+]/ [ HSO4-] | ????? |
Na2CO3 | CO32-+H2O->HCO3-+OH- | [HCO3-][OH-]/[CO32-] | ????? |
NH4CL | NH4++H2O->NH3+H3O+ | [NH3][H3O+]/[NH4+] | ????? |
Jarrod RobelLv2
29 Jul 2019
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