- Carboxylic acids (R-COOH) donate a proton (H⁺) to form a carboxylate anion (R-COO⁻). - Electron- donating groups (like alkyl groups) attached to the carboxyl group destabilize the negative charge on the carboxylate anion by increasing electron density, thus decreasing acidity. - Electron-withdrawing groups stabilize the negative charge by dispersing it, thus increasing acidity.
Which is the strongest acid?
Asked in TNPSC CS Prelims 2014 · Topic: Organic Acid (Acidity of Carboxylic Acids: Factors Affecting Acidity (Inductive, Resonance Effects, pKa Values))
More Chemistry questions
- Which of the following statements about carboxylic acids is/are correct? 1. Simple aliphatic carboxylic acids are soluble in water. 2. Higher carboxylic acids are practically insoluble in water. 3. The acidity of a carboxylic acid depends on the number of carbon atoms present in the hydrocarbon chain. Select the correct answer using the code given below.
- Simple aliphatic carboxylic acids (e.g., formic acid, acetic acid) are soluble in water because the polar carboxyl group (-COOH) can form hydrogen bonds with water molecules. 2. As the hydrocarbon chain length increases in higher carboxylic acids, the nonpolar hydrophobic part dominates, making them practically insoluble in water. 3. The acidity of a carboxylic acid is related to the stability of its conjugate base (carboxylate ion). Alkyl groups are electron-donating, which destabilizes the negative charge on the carboxylate ion. Therefore, increasing the number of carbon atoms (length of the alkyl chain) generally decreases the acidity of aliphatic carboxylic acids. The hydrocarbon chain's size does influence acidity. 4. Assertion (A): Formic acid is a stronger acid than acetic acid. Reason (R): Formic acid is an organic acid.
- The correct order of increasing acidic strength of the following acids is - (1) $CCl_3‐ COOH > CF_3COOH > NO_2-CH_2COOH > NC-CH_2COOH$ (2) $CF_3COOH > CCl_3‐ COOH > NO_2-CH_2COOH > NC-CH_2‐ COOH$ (3) $NC-CH_2COOH > NO_2-CH_2‐ COOH > CF_3COOH > CCl_3COOH$ (4) $NO_2-CH_2COOH > CCl_3COOH > CF_3‐ COOH > NC-CH_2COOH$ (5) Question not attempted
- pKa value of Acetic Acid is
- The order of acidic strength of the following is : Phenol, Benzoic acid, p-Nitrophenol
- Acetylsalicylic acid is known as:
- Acetoxy Benzoic Acid is commonly called
- Which one of the following is an organic acid ?