What does it mean to standardize NaOH?

Standardization is the process of determining the exact concentration (molarity) of a solution. In the first standardization the molarity of a sodium hydroxide solution (NaOH) will be determined by titrating a sample of potassium acid phthalate (KHP; HKC8H4O4) with the NaOH.

What is the purpose of standardizing solution?

Standard solutions are solutions that contain a known and accurate amount (i.e. concentration) of a substance or element. These solutions are commonly used to help identify and determine the concentration of a substance whose concentration is unknown.

Why is it important to standardize a solution before titration?

The so-called titer determination or standardization of a volumetric solution used for titration is one of the most important preconditions for reliable and transparent titration results. Accurate and reliable titration results are only achievable when we work with the exact concentration of the volumetric solution.

Why must NaOH be standardized Why can’t an exact solution of NaOH be prepared?

However, it is very difficult to prepare a solution of NaOH of an exact concentration for two reasons: Solid NaOH is very hygroscopic, that is it absorbs water from the air, so it is very hard to weigh exactly. This decreases the concentration of the OH- ions in the solution.

How do you standardize NaOH?

To Standardize:

1. Transfer 25.00 mL (measured with a calibrated pipette) into a 250 mL Erlenmeyer flask and dilute with an equal volume of water.
2. Add 1 M NaOH to raise the pH to 12 (measure with a pH meter or pH paper).
3. Add 4-8 drops of hydroxynaphthol blue indicator to the solution and record the color.

Why is it necessary to standardize a given titrant?

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.

Why do we standardize data?

Data standardization is about making sure that data is internally consistent; that is, each data type has the same content and format. Standardized values are useful for tracking data that isn’t easy to compare otherwise.

Why do we need to standardize NaOH solution after preparation?

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 do strong bases need to be standardized?

In order to have accurate solutions of NaOH, you must standardize the solution. The best way of doing this is to use a primary standard, which is a solid acid that can be weighed. To have a good primary standard it should not absorb anything readily from the air.

Why does a standardize NaOH solution need to be kept in a close container?

Without a proper closed container, sodium hydroxide readily attracts water and become a viscous solution (concentrated sodium hydroxide). This solution readily attracts carbon dioxide in air and reacts with it.

What is meant by standardisation?

Standardization or standardisation is the process of implementing and developing technical standards based on the consensus of different parties that include firms, users, interest groups, standards organizations and governments.