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- Why are many ionic precipitates washed with electrolyte solution instead of pure water?1. Discuss the a) direct method of weighing b) indirect weighing using the analytical balance. 2. Explain how suction filtration is carried out in the laboratory. Give the important points that must be observed in doing the process. 3. Explain why it is important to wash the precipitate. Can distilled water be used to wash all types of precipitates? 4. Discuss how to use a desiccator. When should a desiccant be replaced? PreviousNextList the steps required in gravimetry to prevent impurities in the final precipitate.Please show COMPLETE solution.
- How was the precipitate obtained after filtration? By scraping from the filter paper and transferring to a watch glass. By redissolving in hydrochloric acid. By drying the precipitate on the filter paper using a desiccator. By charring the filter paper and igniting the product in a crucible.Question: The possible reasons for the ignition of gravimetric precipitate areUsing the concepts of volumetry, classify statements as true or false. Justify the one(s) that you judge to be “false”. a) Constant weight is to repeat the entire analytical procedure, until 2 consecutive measurements of the scales vary in mass up to 0.002 g b) The nickel dimethylglyoximate precipitate is of the true crystalline type c) Gravimetric factor is the relationship between the mass of starting material and the mass of the product d) In direct determination, volatilization gravimetry, the volatilized sample is collected on a certain (previously determined) mass of appropriate adsorbent material (silica, alumina) and weighed up.
- Method of separation/chemical reaction (with brief process) of Precipitated sulfur.A small von Weirmarn ratio is desirable, therefore it is advisable to form precipitate by, Precipitation from cold solution Highly dilute solution by addition of dilute reagents Stirring reagents Faster addition of reagentsHow to minimize supersaturation and thus lead to crystalline precipitate?
- Which of the following is not one of the properties of the precipitate in the gravimetric analysis method?A.Should be easily drainedB. resolution should be lowC. must be volatileD. should not react with atmospheric componentsWhich among these is/are properties for the type of precipitate required in gravimetric analysis? Hygroscopic Known composition Reactive with atmospheric constituents Large particlesThe gravimetric analysis of nickel in copper and iron, what is the purpose of "dipping" the precipitation in this experiment