In: Chemistry
Fill out table 4 for all pH measurements made in table 2.
Table 2: pH of acids and conjugate bases
| Solution | observed pH |
| Sodium Acetate | 7.35 |
| Calcium Formate | 6.65 |
| Sodium Hydrogenate Phosphate | 9.03 |
|
Formic Acid |
2.57 |
| Acetic Acid | 2.88 |
| Sodium Dihydrogen Phosphate | 4.48 |
| Hydrochloric Acid | 1.44 |
| Hydrobromic Acid | 1.37 |
| Nitric Acid | 1.35 |
| Sodium Nitrate | 4.18 |
| Sodium chloride | 5.25 |
| Sodium Bromide | 5.45 |
Table 4: pH for acids and bases (include in this table all solutions from table 2)
| Solution Name | pH | Major Species in Solution | Reaction that determines pH |
| Sodium Acetate | 7.35 | ||
| Calcium Formate | 6.65 | ||
| Sodium Hydrogenate Phosphate | 9.03 | ||
| Formic Acid | 2.57 | ||
| Acetic Acid | 2.88 | ||
| Sodium Dihydrogen Phosphate | 4.48 | ||
| Hydrochloric Acid | 1.44 | ||
| Hydrobromic Acid | 1.37 | ||
| Nitric Acid | 1.35 | ||
| Sodium Nitrate | 4.18 | ||
| Sodium chloride | 5.25 | ||
| Sodium Bromide | 5.45 |
|
Solution Name |
pH |
Major Species in Solution |
Reaction that determines pH |
|
Sodium Acetate |
7.35 |
CH3COO- |
Negative charge delocalisation in acetate anion |
|
Calcium Formate |
6.65 |
HCOO- |
Equivalent resonance structure |
|
Sodium Hydrogenate Phosphate |
9.03 |
HPO42- |
Negative charge delocalisation between 2 P=O bond |
|
Formic Acid |
2.57 |
HCOO- |
Negative charge delocalisation and equivalent resonance structure |
|
Acetic Acid |
2.88 |
CH3COO- |
Negative charge delocalisation in acetate anion gives the stability |
|
Sodium Dihydrogen Phosphate |
4.48 |
H2PO41- |
Negative charge delocalisation between P=O bond |
|
Hydrochloric Acid |
1.44 |
Cl- |
Negative charge upon more electronegative atom |
|
Hydrobromic Acid |
1.37 |
Br- |
Negative charge upon more electronegative atom |
|
Nitric Acid |
1.35 |
NO3- |
Negative charge delocalisation in nitrate anion gives the stability |
|
Sodium Nitrate |
4.18 |
NO3- |
Negative charge delocalisation in nitrate anion gives the stability and ionic compound |
|
Sodium chloride |
5.25 |
Cl- |
Ionic compound |
|
Sodium Bromide |
5.45 |
Br- |
Ionic compound |