A solution is prepared by adding 0.064 mole of K3 (Fe(CN)6] to 0.77 L of 2.0 M NaCN. Assuming no volume change, calculate the concentrations of Fe(CN)6* and Fe+ in this solution. The 3- K (overall) for the formation of Fe(CN), is 1.0 x 1042. 3- 3- M Fe 3+ M %3|
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![A solution is prepared by adding 0.064 mole of
K3 (Fe(CN)6] to 0.77 L of 2.0 M
NaCN. Assuming no volume change, calculate the concentrations of
Fe(CN)6* and
Fe+ in this solution. The
3-
K (overall) for the formation of
Fe(CN), is
1.0 x 1042.
3-
3-
M
Fe
3+
M
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- what mass in grams of Na2S2O3 is needed to dissolve 4.7 g of AgBr in a solution volume of 1.0 L given that Ksp for AgBr is 3.3 x 10^-13 and Kf for [Ag(S2O3)2]^3- is 4.7 x 10^13?1,5419 g of magnetite (Fe3O4) ore; Fe+2 and Fe + 3 in concentrated HCL to form a mixtureit's unraveling. Adding HNO3 to all Fe +2s Fe +3 e and Fe+3 s NH, addingwith Fe(OH)3, precipitating into. Sediment in the form of Fe3O4 after necessary operationsand 0.8525 g. Calculate the percentage of Fe3O4 in the sample.A solution was prepared by dissolving 1210 mg of K3Fe(CN)6 (329.2 g/mol) in sufficient water to give 785 mL. Calculate b) the weight/volume percentage of K3Fe(CN)6, the number of millimoles of K+ in 35.0 mL of this solution, and the ppm of Fe(CN)63-
- If the molar solubility of Tl2S at 25 oC is 5.31e-08 mol/L, what is the Ksp at this temperature?Ksp = (b) It is found that 9.14e-08 g of Sc(OH)3 dissolves per 100 mL of aqueous solution at 25 oC. Calculate the solubility-product constant for Sc(OH)3.Ksp = (c) The Ksp of Cu3(PO4)2 at 25 oC is 1.40e-37. What is the molar solubility of Cu3(PO4)2?solubility = mol/LCalculate the solubility of TlBrO3(s) in water in grams per liter at 25C given that Ksp=1.1x10^-12 M^3.What is the percentage of Nickel in an ore if, when analyzed by the cyanide method, 20.00mL of KCN solution (containing 1.00mmol of AgNO3 per milliliter) are used? Wt of sample used = 0.2500g
- A solution was prepared by dissolving 1210 mg of K3Fe(CN)6 (329.2 g/mol) in sufficient water to give 775 mL. Calculate(a) the molar analytical concentration of K3Fe(CN)6.(b) the molar concentration of K+.(c) the molar concentration of Fe(CN)63-.(d) the weight/volume percentage of K3Fe(CN)6.(e) the number of millimoles of K+ in 50.0 mL of this solution.(f) ppm Fe(CN)63- .(g) pK for the solution.(h) pFe(CN)6 for the solution.How many grams of PbF2 (molar mass = 245.2) will dissolve in 700 mL of 0.60 M NaF solution? The Ksp for PbF2 is 2.69e-08.Determine the solubility of KIO4 in water. Volume of saturated KIO4 in conical flask is 25.0 ml,KI is 2g,H2SO4 (3.0M) is 20.0 ml added to KI solution , volume of 0.200 M sodium thiosulphate used for titration is 8.00 ml.and if mean ionic activity co efficient,y+- of KIO4 in the saturated solution is 0.85 ,what is Ksp. .
- A 600.0 mg sample consisting of only CaC2O4and Mg C2O4is heated at 500oC converting the two salts to CaCO3and MgCO3. The sample weighs 465.0 mg. If the sample had been heated at 900oC where the products are CaO and MgO, what would the mixture of oxides weigh? Write in a padpaper and show the clear and complete solutionThe mass of K3PO4 needed to prepare 250.0mL of an aqueous solution in which PO4-3 concentration is 0.0550M. The answer is ……………………… How many grams of silver sample is equal to 0.0417 mole of silver The answer is ……………………… When 38.0 mL of 0.1250 M H2SO4 is added to 100 mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471g, what was the concentration of iodide ions in the original solution The answer is ……………………………… Express 96.342 m using 2 significant figures The answer is ………………………………. The oxidation number of sulfur in (Na2S2O5) is? The answer is ………………………………Compare the solubility of ferrihydrite (Fe(OH)3) and goethite (FeOOH), with dissolution reactions shown below. Fe(OH)3 3 H+ --> Fe3+ + 3 H2O FeOOH + 3 H+ --> Fe3+ + 2 H2O