Question

In: Chemistry

Fill out table 4 for all pH measurements made in table 2. Table 2: pH of...

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

Solutions

Expert Solution

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


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