Question

Phenolphthalein indicator is which indicator.​

Answer 1

it's a synthetic indicator and can't be used for weak bases.

hope it helps

Answer 2

Phenolphthalein is a chemical compound with the formula C20H14O4and is often written as "HIn" or "phph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colourless in acidic solutions and magenta in basic solutions.

Solubility in other solvents: Insoluble in benzene or hexane, very soluble in ethanol ...

Solubility in water: 400 mg/L in water

Melting point: 258–263 °C (496–505 °F; 531–536 K)

Chemical formula: C20H14O4