Explain how to produce an ideal precipitate in the analysis of sodium fluoride, NaF with silver nitrate, AgNO3 as precipitant using precipitation gravimetry
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Q: Give techniques on how to produce an ideal precipitate in the analysis of sodium fluoride, NaF with…
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Q: Why is high relative supersaturation undesirable in a gravimetric precipitation
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Explain how to produce an ideal precipitate in the analysis of sodium fluoride, NaF with silver nitrate, AgNO3 as precipitant using precipitation gravimetry.
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- Give techniques on how to produce an ideal precipitate in the analysis of sodium fluoride, NaF with silver nitrate, AgNO3 as precipitant using precipitation gravimetry.Why is high supersaturation undesirable in a gravimetric precipitation?Why is high relative supersaturation undesirable in a gravimetric precipitation
- Calculate the % relative error in solubility by using concentrations instead of activitiesfor Fe(OH)2 in 0.0500 M KNO3 (give the source for thermodynamic solubility).The precipitation of Al(OH)3 (Ksp = 1.3 x 10-33) is sometimesused to purify water. (a) Estimate the pH at whichprecipitation of Al(OH)3 will begin if 5.0 lb of Al2(SO4)3is added to 2000 gal of water. (b) Approximately howmany pounds of CaO must be added to the water toachieve this pH?What wt of magnetite should be taken for analysis in order that after converting to a precipitate of Fe2O3.xH2O, the percentage of Fe3O4 in the sample can be found by multiplying the wt in grams of the ignited precipitate (Fe2O3) by 100.
- To determine the fluoride content in an aqueous and chloride-containing preparation of ammonium fluoride, the following analysis was performed. 105.2 mg of the preparation was dissolved in 100.0 mL of water. Then a 300 mL 40 mM lead chloride solution was added, whereby all fluoride ions were precipitated out of the solution in the form of the sparingly soluble salt PbClF (s). The precipitate was separated and washed at 15 degrees with a lead fluoride chloride saturated solution and dried at 130 degrees. The precipitate weighed 651.3 mg. a) Calculate the fluoride content (as % by weight F) in the preparation.b) Determine the purity of the ammonium fluoride preparationWrite the Ksp expression for the solubility of potassium bitartrate at room temperature and describe how the Ksp for the solubility of potassium bitartrate changes as the solution is heated to its boiling point.Use the expression of the activity coefficient to calculate the coefficient of activity of cobalt in the equilibrium solubility of Co (OH) 2 (Ksp = 1.3 x 10-15) in the presence of a solution containing 0.0333M NaCl. ions α: αCo 2+ = 0.45nm, αOH- = 0.30nm, -log γx = 0.51 zx2 √µ 1 + 3.3 αx√µ Select one:to. 0.51b. 0.91c. 0.75d. 0.83
- Write the expression for the solubility-product constant for CaF2, and look up the corresponding Ksp value.Enumerate the types of gravimetric analysis aside from volatilization gravimetry, precipitation gravimetry, electrogravimetry, and thermogravimetricWhich of the following conditions would lead to an increase in the relative supersaturation of a solution during precipitation gravimetry? a. decrease in temperature b. slow addition of precipitating agent c. precipitation from a hot solution d. vigorous stirring