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What is primary & Secondary Standard ? Give Example
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Answer / neah
The substance which is sufficiently pure(99.9%) and dissolve immediately in a solvent is called primary standard substances.
The substance whose concentration can be determined with reference to primary standard substance is called secondary standard.
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Answer / thondhavada swathi
a standard solution can be obtained by dissolving a definite weight of substance having known purity is called primary standard.ex:nacl
Volumetric solutions ara known as secondary standards .ex:kmno4
| Is This Answer Correct ? | 2 Yes | 3 No |
Answer / p s yadav
Primary standard-:
It is essential that there shall be one and only one material standard (length standard).
Secondary standard -:
The material which are made as nearly as possible to the primary standard with which they are compared at intervals, and records of their deviation from it.
| Is This Answer Correct ? | 0 Yes | 4 No |
Answer / rajat mishra
Primary standard is a reagent which is very pure representative of the No. Of moles contain
Secondary standard :
Volumetric solution are known as secondary standard
| Is This Answer Correct ? | 0 Yes | 5 No |
Answer / en
For example in pharmaceutical chemistry primary standard will be pharmacopoeia's standard - USP or CRS, but they are very expensive. So you can fully characterize your "in house" material as your primary standard and use it for analysis. All next batch of standard, characterized vs. primary will be secondary standard. A part of primary standard should be stored for secondary standards characterizations.
| Is This Answer Correct ? | 30 Yes | 37 No |
Answer / nisha (college student)
primary std thats stdrd solution can be prepare but secondry thats stdnrd solution can not be prepared
eg. acetic acid is primary std but sulfuric acid is secondry
| Is This Answer Correct ? | 12 Yes | 38 No |
Answer / kishanpal singh fare labs gurg
Primary standard :
the Primary standards are the NIST ,ISO ASC Standard
tracible materials
.This primary stadards
the solutions which are use for
the calibration of analytical instruments.
also used to standardization of std( Normal & Molar solution
Secondary standards:
are use to routine analysis known as
secondary standards for but Secondary standards are liquid
calibration of analytical instruments.
also used to standardization of std( Normal & Molar solution
| Is This Answer Correct ? | 44 Yes | 72 No |
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