Question

1. what is potassium hydrogen phthalate? for what is it used?

Explanation:

Potassium hydrogen phthalate (KHP) is an organic compound with the formula \(C_8H_5KO_4\). It is a white crystalline solid that is soluble in water. In chemistry, it is often used as a primary standard in acid - base titrations. This is because it can be obtained in high purity, has a relatively high molar mass (which reduces weighing errors), and reacts stoichiometrically with strong bases. For example, in the titration of a strong base like sodium hydroxide (\(NaOH\)) with an acid, KHP can be used to accurately determine the concentration of the \(NaOH\) solution. The reaction between KHP (\(KHC_8H_4O_4\)) and \(NaOH\) is \(KHC_8H_4O_4+NaOH = KNaC_8H_4O_4 + H_2O\).

Answer:

Potassium hydrogen phthalate (\(KHP\), \(C_8H_5KO_4\)) is an organic compound. It is used as a primary standard in acid - base titrations.