Analytical Chemistry: An IntroductionHolt, Rinehart and Winston, 1965 - 527 pagine |
Dall'interno del libro
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Pagina 44
... base for Naperian logarithms , 2.718 . The term σ is called the standard deviation and is a constant having a unique value for any set consisting of a very large number of measurements . The breadth of the normal - error curve is fixed ...
... base for Naperian logarithms , 2.718 . The term σ is called the standard deviation and is a constant having a unique value for any set consisting of a very large number of measurements . The breadth of the normal - error curve is fixed ...
Pagina 47
... deviation is calculated as before ; the results would now be reported as 56.04 ± 0.07 percent CaO . It is ... Standard Deviation . The data of Table 3-2 can be considered as being five of an infinite number of values we might have ...
... deviation is calculated as before ; the results would now be reported as 56.04 ± 0.07 percent CaO . It is ... Standard Deviation . The data of Table 3-2 can be considered as being five of an infinite number of values we might have ...
Pagina 48
... standard deviation ( 0.11 percent ) about the average value of 56.06 percent , and nineteen out of twenty within twice this range ( 2 × 0.11 percent ) . These estimates are , of course , provisional upon the reliability of s . It is ...
... standard deviation ( 0.11 percent ) about the average value of 56.06 percent , and nineteen out of twenty within twice this range ( 2 × 0.11 percent ) . These estimates are , of course , provisional upon the reliability of s . It is ...
Sommario
The Scope of Analytical Chemistry | 1 |
Some Elementary Concepts | 7 |
The Evaluation of Analytical Data | 34 |
Copyright | |
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absorbance absorption acid solution addition AgCl AgNO3 aliquot analysis analytical barium base buffer buret Calculate carbonate cell cerium chemical chemist chloride ion colloidal color complex compound coprecipitation crucible determined deviation dilute dissociation dissolved employed end point equation equilibrium constant equivalence point equivalent weight error example excess F solution Fe2+ filter flask formal concentration formula weight grams gravimetric H₂ H₂O H3O+ half reaction hydrogen ion hydronium ion hydroxide indicator iodide iodine ion concentration iron iron III KMnO4 liquid liter measurement metal method milliequivalents ml of water mol/liter NaOH normality oxalate oxidation particles percent permanganate phenolphthalein pipet potassium potentiometric precipitate quantity radiation reagent reduced result salt sample silver chloride silver ion silver nitrate sodium sodium carbonate solid solubility solvent species standard hydrogen electrode standard solution substance sulfate sulfuric acid temperature thiocyanate tion titration curve volt volume volumetric wash weak acid