How do you find the standardization of NaOH with KHP?

To Standardize: Weigh ~0.8 g of dried KHP (MW = 204.23 g/mol) into an Erlenmeyer flask and dissolve in 50-75 mL of distilled water. Record the amount of KHP and water used. Add 4 drops of indicator into the flask and titrate to the first permanent appearance of pink.

How do you find the mass of KHP?

The mass of KHP present in the sample is calculated by multiplying the number of moles of KHP by the molecular weight of KHP.

Why does NaOH need to be standardized with KHP?

But when it comes to anything analytical where you start to involve calculations, standardization is a must. This is done with NaOH because it’s hygroscopic and readily sucks up the moisture in the air. So what is being weighed isn’t totally NaOH, but also the moisture that it has absorbed.

How do you standardize chemicals?

Standardization is the process of determining the exact concentration (molarity) of a solution. Titration is one type of analytical procedure often used in standardization. In a titration, an exact volume of one substance is reacted with a known amount of another substance.

How do you standardize 1n NaOH?

Dissolve 4.5 g of sodium hydroxide in 100 mL distilled water, allow to cool, and then add saturated barium hydroxide solution drop wise with stirring until a precipitate is formed. Leave aside allowing for complete precipitation, filter, and collect the filtrate to be standardized against 1 N HCl solution.

How does Khp react with NaOH?

A commonly used primary standard for titration with sodium hydroxide solution is the weak acid potassium hydrogen phthalate or KHP (C8H5O4K). In this reaction as well, one mole of KHP completely reacts with one mole of NaOH. The titration of NaOH with KHP involves adding NaOH from the burette to a known volume of KHP.

Why do we standardize NaOH?

The reason we must standardize strong base solutions is because substances like NaOH will naturally absorb moisture from the air and react with gases in the air, such as CO2, to produce unwanted impurities in the stock sample of the base.

Why are Titrants standardized?

Why should you standardize your titrant? Knowing the exact titrant concentration is important for correct titration results. Therefore, standardization will give you more security to obtain the correct results for your titrations.

Can KHP be a primary standard?

Potassium Hydrogen Phthalate (KHP) is a classic primary standard substance in that it is readily available in high purity; is relatively inexpensive; is easy to dry; is neither hygroscopic, oxidized by air, nor affected by Carbon Dioxide (thus making it easy to weigh out); does not undergo decomposition during storage; …