high gfm - property of a primary standard, weighing by difference - most accurate method of weighing, stopper and invert - last step in making up a standard solution, desiccator - stops substances reabsorbing water, starch - indicator used in iodine titrations, absorbs water - why sodium hydroxide is not a primary standard, to provide H+ ions - why acid is added to permanganate titrations, ETDA solution - most common complexometric reagent, ascorbic acid - used as a control for Vitamin C analysis, results are reliable - results are close to each other, results are accurate - results are close to theoretical value, equivalence point - when the quantities of reagents are the same, end point - when excess of one reagent has been added, accurate - exact weight is recorded, approximately - about a certain number of g is weighed,

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