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An amphiprotic molecule (or ion) can either donate or accept a proton, thus acting either as an acid or a base. Water, amino acids, hydrogencarbonate ion (or bicarbonate ion) HCO − 3, dihydrogen phosphate ion H 2 PO − 4, and hydrogensulfate ion (or bisulfate ion) HSO − 4 are common examples of amphiprotic species. Since they can donate a ...
Leveling effect or solvent leveling refers to the effect of solvent on the properties of acids ... Amphiprotic solvents: Solvents which act both as protophilic or ...
In general terms, any solvent that contains a labile H + is called a protic solvent. The molecules of such solvents readily donate protons (H +) to solutes, often via hydrogen bonding. Water is the most common protic solvent. Conversely, polar aprotic solvents cannot donate protons but still have the ability to dissolve many salts. [1] [2]
A species that can either accept or donate a proton is referred to as amphiprotic. An example is the H 2 O (water) molecule, which can gain a proton to form the hydronium ion, H 3 O +, or lose a proton, leaving the hydroxide ion, OH −. The relative ability of a molecule to give up a proton is measured by its pK a value.
Also amphiprotic. (of a chemical species) Tending to behave both as an acid and as a base, depending upon the medium in which the species is situated; e.g. sulfuric acid (H 2 SO 4) is a strong acid in water but behaves more like a base in superacids. amyl A common non-systematic name for a pentyl group. analyte
The bicarbonate ion carries a negative one formal charge and is an amphiprotic species which has both acidic and basic properties. It is both the conjugate base of carbonic acid H 2 CO 3; and the conjugate acid of CO 2− 3, the carbonate ion, as shown by these equilibrium reactions: CO 2− 3 + 2 H 2 O ⇌ HCO −
A solvent will be more likely to promote ionization of a dissolved acidic molecule in the following circumstances: [35] It is a protic solvent, capable of forming hydrogen bonds. It has a high donor number, making it a strong Lewis base. It has a high dielectric constant (relative permittivity), making it a good solvent for ionic species.
Phospholipids, such as this glycerophospholipid, have amphipathic character. Cross-section view of the structures that can be formed by biological amphiphiles in aqueous solutions.