Question

How are reagent grades (GR, AR, CP) typically categorized in laboratory settings?

a. Based on specific chemical reactions
b. Manufacturer-dependent and not standardized
c. Determined by the reaction temperature
d. Universally defined by regulatory bodies

Answer 1

Reagent grades (GR, AR, CP) are categorized based on specific chemical reactions. The three common categories are General Reagent, Analytical Reagent, and Chemically Pure. These categorizations are widely recognized and followed in laboratory settings.

Step-by-step explanation:

In laboratory settings, reagent grades are typically categorized based on specific chemical reactions. They are classified according to their purity level and suitability for different types of analyses. The three common categories of reagent grades are:

1. GR (General Reagent): These are suitable for general laboratory use and have a relatively lower level of purity.
2. AR (Analytical Reagent): These reagents have a higher level of purity and are used for analytical techniques that require accurate and precise results.
3. CP (Chemically Pure): This grade represents the highest level of purity and is used for specific laboratory applications where even minor impurities can affect the experimental results.

These categorizations are not manufacturer-dependent and are widely recognized and followed in laboratory settings.