How is potassium hydrogen phthalate?

Potassium hydrogen phthalate, often called simply KHP, is an acidic salt compound. KHP is slightly acidic, and it is often used as a primary standard for acid–base titrations because it is solid and air-stable, making it easy to weigh accurately. It is not hygroscopic.

What is potassium hydrogen phthalate and what is it used for?

Potassium hydrogen phthalate is used as a primary standard for acid- base titrations as well as for calibrating pH meters. It acts as a buffer in pH determination. It finds application as a useful standard for total organic carbon testing.

What is the chemical equation for KHP and NaOH?

We have a balanced chemical equation in which we now know the exact quantity of one of the reagents (KHP) – NaOH(aq) + KHC8H4O4(aq) = KNaC8H4O4(aq) + H2O(l) – thus we can determine the number of moles of NaOH that reacted with the KHP….Stoichiometry and Solutions.

M =	mol
V(L)

What is the anion in potassium hydrogen phthalate?

HP−
Explanation: Potassium hydrogen phthalate, or simply KHP , is actually an acidic salt because its anion, the hydrogen phthalate anion, HP− , acts as a weak acid in aqueous solution.

Is potassium acid phthalate the same as potassium hydrogen phthalate?

When KHP is used as a basimetric standard (e.g., in standardization of Perchloric Acid in Glacial Acetic Acid), Methyl Violet or Crystal Violet indicator is commonly used….Potassium Hydrogen Phthalate.

Potassium Hydrogen Phthalate Potassium Acid Phthalate, KHP
Chemical Formula	HOCO(C6H4)COOK
CAS No.	877-24-7

Is potassium hydrogen phthalate toxic?

Ingestion: May cause irritation of the digestive tract. May be harmful if swallowed. Inhalation: May cause respiratory tract irritation. May be harmful if inhaled.

What is the molar mass of potassium hydrogen phthalate?

204.22 g/mol
Potassium hydrogen phthalate/Molar mass

KHP (MWT = 204.22 g/mol) is a monobasic acid that contains one mole of neutralizable hydrogen per mole of compound.

How do you standardize a titrant?

Fill the burette with your 0.843 M NaOH titrant and record the exact titrant level. Place the burette over the beaker of dissolved KHP and slowly titrate the sample recording the volume of base added and solution pH after each titrant addition. The pH will probably take some time to stabilize after each base addition.

How do you find the normality of potassium hydrogen phthalate?

To find the amount of potassium hydrogen phthalate (KHC8H4O4) needed to make 0.25 liters of a 0.05N solution: Grams of KHC8H4O4 needed = (0.05N)(204 eq. mass)(0.25 liters) = 2.6 grams of KHC8H4O4….Normality.