Why is NaCl a primary standard substance?

Why is NaCl a primary standard substance?

There are many examples of primary standards. Sodium chloride (NaCl), which is used as a primary standard for silver nitrate (AgNO3) reactions. Zinc powder, which can be used to standardize EDTA (ethylenediaminetetraacetic acid) solutions after it has been dissolved in hydrochloric or sulfuric acid.

Can a primary standard be hygroscopic?

In chemistry, a primary standard is a reagent that is very pure, stable, not hygroscopic, and has a high molecular weight. Ideally, it’s also non-toxic, inexpensive, and readily available.

Which is the primary reason why we can not use NaOH as a primary standard in a titration?

Question: 1. Sodium hydroxide cannot be used to prepare a primary standard titration solution because the compound is not available in high purity. The most common impurity is water because sodium hydroxide is hygroscopic, meaning it absorbs water from the air.

Can standard solution hygroscopic?

primary standard solutions are not hygroscopic.

Why is HCl not a primary standard?

Primary Standards for Acid-Base Titrations Hydrochloric acid, HCl, and sulfuric acid, H2SO4, are NOT suitable for use as a primary standard because although they are both commercially available as concentrated solutions that are easily diluted, the concentration of the “concentrated” solution is NOT accurately known.

Why do we need standards in chemistry?

What is a Standard? Standards are materials containing a precisely known concentration of a substance for use in quantitative analysis. A standard provides a reference that can be used to determine unknown concentrations or to calibrate analytical instruments.

Why NaOH Cannot be used to prepare a buffer?

NH 3 is a weak base, but NaOH is a strong base. The combination of these two solutes would not make a buffer solution.

Why is NaOH not used to prepare a standard solution?

Sodium hydroxide is deliquescent (absorbs moisture from the atmosphere) solid. It cannot be weighed accurately. Therefore, it is not possible to prepare a standard solution of sodium hydroxide of accurately known concentration by weighing NaOH.

Is Mohr’s salt a primary standard?

Oxalic acid, Mohr’s salt, potassium dichromate are some examples of primary standards.