dvr Potassium Chromate Solution

Potassium Chromate Indicator for Silver – Chloride Titrations. Chemical Manufacturer of Specialty Bulk Inorganic Chemicals, Reagents and Fine Organic Chemicals for Process Chemistry. Also refer this link http://rxmarine.com/silver-nitrate

Technical Specifications:

 

Physical State Liquid
Appearance yellow
Odor odorless
pH 8.6-9.8 (5% soln)
Vapor Pressure 0
Vapor Density Not applicable
Evaporation Rate Not applicable
Viscosity Not applicable
Boiling Point Not available
Freezing/Melting Point 975 deg C
Autoignition Temperature None reported
Flash Point Not available
Decomposition Temperature Not available
NFPA Rating (estimated) Health:
2; Flammability: 0;
Reactivity: 0
Explosion Limits, Lower None reported
Upper None reported
Solubility Soluble
Specific Gravity/Density 2.7320
Molecular Formula K2CrO4
Molecular Weight 194.20
Note:

Unlike the less expensive sodium salt, potassium salt is mainly used for laboratory work in situations where an anhydrous salt is required. It is as an oxidizing agent in organic synthesis. It is used as in qualitative inorganic analysis, e.g. as a colorimetric test for silver ion. It is also used as an indicator in precipitation titrations with silver nitrate and sodium chloride (they can be used as standard as well as titrant for each other) as potassium chromate turns red in the presence of excess of silver ions.

Using Procedure:

Place 10 drops of sample water in a test tube and add 1 drop of 5% potassium chromate (K2CrO4) solution as indicator. Add dropwise 2.9% silver nitrate with the same dropper until a permanent and distinct colour change to a red brown colour occurs.

 

Potassium Chromate, 5% (w/v) Aqueous Solution; Chloride free 500mL; Poly bottle; Indicator for argentometric titrations

 

CAS 7732-18-5,7789-00-6,7761-88-8

Note: This article uses material from the http://rxmarine.com/