what is the difference between a primary and secondary standard give an example of each?
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A primary standard is a reagent that is extremely pure, stable, it not a hydrate /has no water of hydration, and has a high molecular weight . A secondary standard is a standard that is prepared in the laboratory for a specific analysis. It is usually standardized against a primary standard.
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As nouns the difference between standard and standardization is that standard is a principle or example or measure used for comparison while standardization is the process of complying (or evaluate by comparing) with a standard.
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Reference standards and working standards are same thing and reference standards are of higher quality or precision and we use these standards very little whereas working standards are of lower precision and we use them in our daily routine. Normally, reference standards are used to calibrate the working standards.
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primary - information that you collect yourself, eg tallies, measurements and photographs. secondary - information that someone else has previously collected and made available, eg on the internet.
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Primary sources provide raw information and first-hand evidence. ... Secondary sources provide second-hand information and commentary from other researchers. Examples include journal articles, reviews, and academic books.
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Differentiate between reagent and primary standard grade chemical. Reagent is a material that is not necessarily extremely pure, but can be used if purity is determined. Primary standard is used to compare unknown amounts of reagent to itself, because the precise concentration of primary standards is known.
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In labeling theory, what is the difference between primary and secondary deviance? Secondary deviance is an eventual effect of primary deviance, where deviance begins. ... Primary deviance is the first act of rule breaking that would label someone a deviant and influence how people think about you.
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As nouns the difference between fundamental and basic is that fundamental is a leading or primary principle, rule, law, or article, which serves as the groundwork of a system; essential part, as, the fundamentals of linear algebra while basic is a necessary commodity, a staple requirement.
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The key difference between primary and secondary standard solution is that primary standard solution has a high purity and less reactivity whereas secondary solution has a less purity and high reactivity. ... Standard solutions have accurately known concentrations and we prepare these solutions using standard substances.
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The disadvantage of primary data is the cost and time spent on data collection while secondary data may be outdated or irrelevant. Primary data incur so much cost and takes time because of the processes involved in carrying out primary research.
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A primary source is the original document, a secondary source is the second hand account of the primary document.
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The product of the primary sector is the raw material for secondary sector. The secondary sector is the place where the product from the primary sector is used to produce the product in secondary level. The product produced is hand overed to the tertiary sector where we the services to the product are done.
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The key difference between primary and secondary valency is that primary valency is the oxidation state of the central metal atom of a coordination complex whereas secondary valency is the coordination number of the central metal atom of a coordination complex.
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But the most important difference is that primary data is factual and original whereas secondary data is just the analysis and interpretation of the primary data. While primary data is collected with an aim for getting solution to the problem at hand, secondary data is collected for other purposes.
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Primary means it comes directly from the researcher who conducted the study. The information is most useful when you need specific information on a field. Secondary research is defined as an analysis and interpretation of primary research. ... Secondary research is useful when you need broad information on a topic.
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When you do research, you have to gather information and evidence from a variety of sources. ... A primary source gives you direct access to the subject of your research. Secondary sources provide second-hand information and commentary from other researchers. Examples include journal articles, reviews, and academic books.
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Primary data is information collected through original or first-hand research. For example, surveys and focus group discussions. On the other hand, secondary data is information which has been collected in the past by someone else. For example, researching the internet, newspaper articles and company reports.