Why do some acids have 2 pKa values?
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Why do some acids have 2 pKa values?
A molecule with two pKa values indicates the presence of two different inonizable functional groups. for example salicylic acid has two pKa values one is 4 which is for carboxylic acid group and the other is 14 which is for hydroxyl group of salicylic acid molecule.
How can you distinguish between mono and dicarboxylic acid?
Dicarboxylic acids are solids at room temperature and they have melting points that are higher than those of monocarboxylic acids containing the same number of carbon atoms, since stronger associations between molecules exist, mainly as a result of hydrogen bond formation.
What is the pKa of Malic Acid?
3.40
Malic acid
| Names | |
|---|---|
| Density | 1.609 g⋅cm−3 |
| Melting point | 130 °C (266 °F; 403 K) |
| Solubility in water | 558 g/L (at 20 °C) |
| Acidity (pKa) | pKa1 = 3.40 pKa2 = 5.20 |
What is the pKa of chloroacetic acid?
2.87
Ionization Constants of Heteroatom Organic Acids
| Common Name | Formula | pKa |
|---|---|---|
| chloroacetic acid | ClCH2CO2H | 2.87 |
| citric acid | C(OH)(CH2CO2H)2CO2H | 3.13 4.76 6.40 |
| formic acid | HCO2H | 3.75 |
| ascorbic acid | 4.17 11.6 |
Why would oxalic acid be considered a dicarboxylic acid?
Oxalic acid is an organic acid with the IUPAC name ethanedioic acid and formula HO2C−CO2H. It is the simplest dicarboxylic acid. Oxalic acid has much greater acid strength than acetic acid. It is a reducing agent and its conjugate base, known as oxalate (C2O2−4), is a chelating agent for metal cations.
Is a dicarboxylic acid?
A dicarboxylic acid is an organic compound containing two carboxyl functional groups (−COOH). Other examples of dicarboxylic acids include aspartic acid and glutamic acid, two amino acids in the human body. The name can be abbreviated to diacid.