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www.allinterview.com/showanswers/108820/what-is-primary...

Answer / anna. primary standard: is a reagent that is stable, pure, it is not hydrated and is of known concentration. for example, Na2CO3, NaCl etc secondary standard: is a reagent that is unstabe and very reactive with atmosphere so, have not a conctant concentration.

www.quora.com/What-are-examples-of-a-secondary-standard...

A secondary standard solution is a chemical term that refers to a solution that has its concentration measured by titration with a primary standard solution. For example, making a primary standard solution of [math]Na_2CO_3[/math] and then titrating that to find the accurate concentration of HCl will make the HCl solution secondary standard.

pediaa.com/difference-between-primary-and-secondary...

What is a Secondary Standard Solution. A secondary standard solution is a solution that is made specifically for a certain analysis. A secondary standard is a substance whose active agent contents have been found by comparison against a primary standard.

www.chemicool.com/definition/standards.html

Examples of primary standards for redox titrations are: • potassium dichromate: K 2 Cr 2 O 7, mol wt. = 294.19 g/mol • sodium oxalate: Na 2 C 2 O 4 mol wt. = 134.00 g/mol Secondary Standards. A secondary standard is a standard that is prepared in the laboratory for a specific analysis. It is usually standardized against a primary standard.

www.thoughtco.com/definition-of-primary-standard-and...

A secondary standard is a chemical that has been standardized against a primary standard for use in a specific analysis. Secondary standards are commonly used to calibrate analytical methods. NaOH, once its concentration has been validated through the use of a primary standard, is often used as a secondary standard.

www.reference.com/science/secondary-standard-solution-d...

A secondary standard solution is a chemical term that refers to a solution that has its concentration measured by titration with a primary standard solution, explains EasyChem.com. The amount of chemical reactants in the primary standard solution is known beforehand. Mathematical equations determine how many ions are in a secondary standard ...

www.chemistry-assignment.com/primary-standard-and-secondary...

Substances whose standard solutions cannot be prepared directly are called secondary standards. For example, KMn04, NaOH, KOH, etc. SUITABLE CHEMICALS FOR STANDARD SOLUTIONS. An alternative approach is to buy small quantities of standard solutions (ready-made or concentrated) and use these to standardise one’s own solutions.

www.nios.ac.in/media/documents/dmlt/Biochemistry/Lesson-29.pdf

Primary and Secondary Standards BIOCHEMISTRY MODULE Biochemistry Notes 1. Functions Therefore, standard has the following uses in Biochemistry lab (a) To provide a reference using which we can determine unknown concentration (b) To standardize volumetric solutions (c) Preparation of secondary standard (d) To calibrate an instrument. 2. Types

www.qsstudy.com/chemistry/what-is-secondary-standard-substance

Secondary Standard Substance : The substance which can not kept on open place and they easily react with the components of air (O 2, CO 2 etc.), react with balance when they are weighting are called Secondary Standard Substance. e.g. HCL, H 2 SO 4, NaOH, KOH, KMnO 4, etc. are the Secondary Standard Substance. A secondary standard is a standard that is arranged in the laboratory for a definite ...

www.thoughtco.com/standard-definition-and-examples-in...

There are different levels of standards for physical measurements. The master standards or primary standards are those of the highest quality, which define their unit of measure. The next level of standards in the hierarchy is secondary standards, which are calibrated with reference to a primary standard.The third level of the hierarchy encompasses the working standards.