Which of the following equations represents the solubility product expression for aluminum chlorate, Al(CIO3)3? a) Ksp=[A1³] [CI]³[03]² b) Ksp = [A1] [CIO31]³ c) Ksp [A1³] [CIO3³]] d) Ksp = [A1] [CIO31]³
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- You are given four different aqueous solutions and told that they each contain NaOH, Na2CO3, NaHCO3, or a mixture of these solutes. You do some experiments and gather these data about the samples. Sample A: Phenolphthalein is colorless in the solution. Sample B: The sample was titrated with HCl until the pink color of phenolphthalein disappeared, then methyl orange was added. The solution became pink. Methyl orange changes color from pH 3.01 (red) to pH 4.4 (orange). Sample C: Equal volumes of the sample were titrated with standardized acid. Using phenolphthalein as an indicator required 15.26 mL of standardized acid to change the phenolphthalein color. The other sample required 17.90 mL for a color change using methyl orange as the indicator. Sample D: Two equal volumes of the sample were titrated with standardized HCl. Using phenolphthalein as the indicator, it took 15.00 mL of acid to reach the equivalence point; using methyl orange as the indicator required 30.00 mL HCl to achieve neutralization. Identify the solute in each of the solutions.Ammonium ions can be analyzed by precipitating withH2PtCl6 as (NH4)2PtCl6 and then igniting the precipitate to platinum metal, which is weighed [(NH4)2PtCl6 −−he−a→t Pt + 2NH4Cl(g) + 2Cl2(g)]. Calculate the percent ammonia in a 1.00-g sample that yields 0.100 g Pt by this method.A pink solid has the formula CoCl3·5NH3·H2O. A solution of this solid is also pink in color and when titrated with silver nitrate quickly forms 3 mol of AgCl. Upon heating the pink solid, it loses 1 mole of water and forms a purple solid with the same NH3:Cl:Co ratio. Dissolving and titrating with AgNO3, the purple solid slowly releases one of its chlorides. a) Derive the formulas of the two octahedral complexes.b) draw and name them.c) write the chemical equations of all described reactions.
- Sodium-ion (Na+) and Calcium ion (Ca2+) produce nearly the same color in a flame test (yellow and yellow-orange, respectively). Describe a way to differentiate between the two using a solution of Na2CO3 and write the correct balanced equations. (Hint: Recall the solubility rules of Na+ ion.)1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample in concentrated HCI, giving a mixture of Fe2+ and Fe³+. After adding HNO3 to oxidize any Fe2+ to Fet, the resulting solution was diluted with water and the Fe+ precipitated as Fe(OH)3 by adding NH3. After filtering and rinsing, the residue was ignited, resulting to 0.8525 g of pure Fe2O3. Calculate the: a) % (w/w) Fe b) % (w/w) Fe;O4 in the sample.0.753-g sample of a chlorocarbon compound was analyzed by burning it in oxygen and collecting the evolved gases in a solution of NaOH. After neutralizing, the sample was treated with 25.74 mL of a 0.264 M AgNO3 solution. This precipitated the chloride (Cl-) out as AgCl and left an excess of AgNO3. The excess AgNO3 was titrated with 0.1 M KSCN and required 16.47 mL to reach the endpoint in a Volhard titration. Calculate the % w/w Cl– (35.45 g/mol) in the sample. Provide your answer to 2 places after the decimal point and without units. Reactions: Cl– + Ag+ → AgCl(s) Reaction 1 Ag+ + SCN– → AgSCN(s) Reaction 2 HINT: This is an example of a back-titration. Steps to success: First, calculate the TOTAL amount (in moles) of Ag+ added from the volume and molarity of the silver nitrate solution. Second, determine the EXCESS amount of Ag+ from the reaction with thiocyanate (Reaction 2 above). Third, calculate the…
- A7When Steel wool was added to a blue-colored CuCl2 solution, the color of the solution gradually changed from blue to yellow. At the same time, there is some red solid covering the steel wool. What is the identity of the red solid on steel wool? A) Neutral Cu metal B) an iron oxide C) Precipitate of Fe(OH)2 or Fe(OH)3 D) Cu2+ ionA mixture that contains AgCl and AgBr only was analyzed and found to contain 66.32% Ag. What is the percentage of Br in the mixture?
- By reading the scientific literature, you discover that sodium dodecyl sulfate (SDS), a surfactant emitted by one of the factories, can be detected using a colorimetric method. If SDS is present in the sample, it will react with specific chemicals added to the sample and blue color will appear. What instrument could you use to measure the blue color intensity? A colorimeter A turbidity meter A scale A titratorIn Questions 1 through 6, you will be calculating the initial concentrations of Fe³+ ([Fe³+10) and SCN ([SCN]o) for each of the reactions you will perform. You should transfer the answers to these questions to the appropriate ICE table(s) on the "Data and Calculations" sheet. In all five reactions, you will be using 5.0 mL of 0.0020 M Fe(NO3)3. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is [Fe³+]o in all five of the reactions you will study? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures. If you want to enter your answers in scientific notation, use the format that Blackboard recognizes: 1.5 x 10-3 would be entered as 1.5E-3 (no spaces). QUESTION 2 In Test Tube 1, you will be using 1.0 mL of 0.0020 M KSCN. Each reaction mixture will be diluted to a final volume of 10.0 mL. What is [SCN ] in Test Tube 1? Type your answer, WITHOUT UNITS, in the box below. Include 2 significant figures. QUESTION 3 In Test Tube 2, you will be…2+ A solution contains 0.0410 M Ca and 0.0900 M Ag. If solid Na3PO4 is added to this mixture, which of the phosphate species would precipitate out of solution first? Ca3(PO4)2 Ag3PO4 Na3PO4 When the second cation just starts to precipitate, what percentage of the first cation remains in solution? percentage: 13.41 Incorrect