Preparing a standard curve. 1. determine the absorbance max of [FeSCN]2+               it is 448.1 2. determine the concentration of FeSCN2+ in the stock solution.            M1V1=M2V2   stock solution: ~0.200 M iron (iii) nitrate in 1M nitric acid intial volume: 0.3mL final volume: 10.3mL volume: 10mL   ~0.002M potassium thiocyanate initial volume: 0.3mL final volume: 10.3mL volume: 10mL     not sure if this is needed stock solutions: ~0.200M iron (iii) nitrate in 1M nitric acid: 0.207M ~0.002M iron (iii) nitrate in 1M nitric acid: 0.00209M ~0.002M potassium thiocyanate: 0.00193M

Q: 13. A sample contained Cr(III) species. A 25.00 mL portion of this sample is combined with 10.00 mL…

A: Given data : Volume of Cr(III) sample = 25.0 mL = 25×10-3 L  Concentration of CDTA = 0.0875 M Volume…

Q: 8.00 mL of 6.00 x 10-3 M Fe(NO3)3 (6.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to…

A: We have to calculate the initial moles of SCN-.

Q: 6.00 mL of 8.00 x 10-3 M Fe(NO3)3 (8.00 times 10 to the minus 3rd power M F e (NO3)3) is added to…

A: Given that : Volume of Fe(NO3)3 = 6.00 mL Concentration of Fe(NO3)3 = 8.00 x 10-3 M Volume of KSCN =…

Q: 5.00 mL of 7.00 x 10¯³ M Fe(NO3)3 (7.00 times 10 to the minus 3rd power MFe (NO3)3) is added to 7.00…

A: Molarity of Fe3+  ions = 7.00 × 10-3 M Total Volume = 5 + 7 + 5 = 17 ml = 0.017 L

Q: [CLO-6] Calculate the pMg in the reaction of 50 mL of 0.1 M Mg2* (buffered to plH 10) with 25.5 ml…

A:

Q: Find the solubility of Cr(OH)₃ in a buffer of pH 13.0 [Kₛₚ of Cr(OH)₃ =6.3X10⁻³¹; Kբ of…

A: The chemical equilibrium equation for ionisation of Cr(OH)3 and the formation of Cr(OH)4- is shown…

Q: Determine the concentration of [Zn²+] in the complexometric titration of Zn2+ with EDTA, where 15.00…

A:

Q: Standard solution of Copper (I) complex (111 g/mole) with a concentration of 1.0 mg /mL had an…

A: First of all, we have to convert the concentration mg/mL in terms of Molar concentration.  And then…

Q: 7.00 mL of 5.00 x 103 M Fe(NO3)3 (5.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to 6.00…

A: Initial Molarity of Fe3+ solution = 5.00×10-3mol/L Initial Volume of Fe3+ solution = 7.00 mL…

Q: A 25.0 mL aliquot of 0.0480 M EDTA was added to a 50.0 mL solution containing an unknown…

A: EDTA forms complex with ions in 1 : 1 mole ratio. So first we would write the reactions.  Then we…

Q: Demonstrate that Cu2+ can be titrated by EDTA in the presence of [CH3COO-] = 0.17 M and pH 9.5. b.…

A: The objective of this question is to show the concentration of Cu2+ ions in a sample using EDTA…

Q: 0.3785 g of a sample containing calcium was analyzed by dissolving it in 250 mL and titrating a 25…

A: We have find out the answer.

Q: of parts per million calcium carbonate (100.0869 g/mol) in a 50.00  mL aliquot of milk sample. The…

A: Ppm is equal to mg/L   Millimoles = molarity*volume (in ml) Milligrams= molar mass * millimoles

Q: Q2 [Final Question from Spring 2022] Ksp for Ni(OH)₂ is 6x10-¹6. For a saturated solution of Ni(OH)₂…

A: The objective of the question is to determine the concentration of nickel (II) ions in the given…

Q: A 0.3674 g powdered milk sample was analyzed for calcium by igniting in a crucible at 1000°C, the…

A: Analysis of sampleMass of sample = 0.3674 gTemperature = 1000oCVolume of EDTA required = 15.62…

Q: You wish to measure the iron content of the well water on the new property you are about to buy. You…

A: Given: Concentration of reference solution M1 = 6.99 × 10-4 M Volume of reference solution V1 = 11.0…

Q: What is the value of pMg for 50.0 ml of a 0.0500 M Mg solution buffered at pH 10.00 and titrated…

A:

Q: 4.00 mL of 4.00 x 103 M. Fe(NO3)3 (4.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to…

A: We have  mole is the amount of the substance that contains the same number of particles of the atom…

Q: 2. Explain the difference between "ion product" and Kep. What conditions are necessary for the ion…

A: Ksp is solubility product constant is equlibrium constant for a solid substance dissolving in an…

Q: 0.5 mg sample required 20.5 ml. EDTA for titration. The EDTA was standardized by titrating 25 ml. of…

A: The question is based on the concept of complexometric titration. we have to analyse the alumina…

Q: 7.00 mL of 5.00 x 10-3 M. Fe(NO3)3 (5.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to…

A: We have to calculate the moles of Fe+3 at equilibrium.

Q: Pre-lab question #7: If 28.70 mL of 0.0200 M KMNO4 is required to titrate a 0.250 g sample of…

A: We have to find the percentage of Oxalate ion in given 0.250sample.  Given 28.7 mL of 0.02M KMnO4…

Q: 9.00 mL of 9.00 x 10-³ M Fe(NO3)3 (9.00 times 10 to the minus 3rd power M F e (NO3)3) is added to…

A: We will first calculate the millimoles of all the reactants added and the millimoles of the final…

Q: 6.00 mL of 5.00 × 10-3 M Fe(NO3)3 (5.00 times 10 to the minus 3rd power M F e (NO3)3) is added to…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: A 0.3045 g of CaCO3 primary standard was dissolved using concentrated HCl, evaporated to incipient…

A:

Q: We can determine the copper(II) ion content of a sample using spectrophotometry. The following data…

A: Absorbance is the amount of light absorbed by a substance. The Beer-Lamberts law states that the…

Q: 8.00 mL of 4.00 x 10-3 M Fe(NO3)3 (4.00 times 10 to the minus 3rd power M F e (NO3)3) is added to…

A:

Q: The total concentration of Ca²+ and Mg²+ in a sample of hard water was determined by titrating a…

A: SOLUTION: Step 1: The concentration of magnesium ion is calculated as follows:

Q: 8.00 mL of 6.00 x 10-3 M Fe(NO3)3 (6.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to…

A: Given that : Given that :Initial volume of Fe(NO3)3 = 8.00 mLMolarity of  Fe(NO3)3 =…

Q: A mixture of pure potassium permanganate and pure potassium chromate weighing 0.2400 gram, when…

A:

Q: 5.00 mL of 5.00 x 103 M Fe(NO3)3 (5.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to 7.00…

A: Given: Concentration of Fe(NO3)3 taken = 5.00 × 10-3 M Volume of Fe(NO3)3 solution taken = 5.00 mL…

Q: PHASE 10: A Lab Data - X Calculate Equilibrium Constant Prepared solutions, absorbance, and…

A:

Q: 9.00 mL of 7.00 x 10 M Fe(NO3)3 (7.00 times 10 to the minus 3rd power M F e (NO3)3) is added to 4.00…

A:

Q: A 0.937-g sample containing Ca2+ was dissolved to produce a 500-mL stock solution. A 50-mL aliquot…

A:

Q: equivalent point, 25.00 mL of 0.10 M EDTA is required to titrate 50.00 mL of calcium in body fluid…

A: Calcium react with EDTA to form calcium EDTA complex in stoichiometry ratio of 1:1.

Q: O What is the pM in a titration of 16.0 mL of 0.05 M Ca2+ with 0.05 M EDTA if the titration buffered…

A:

Q: Chromel is an alloy composed of nickel, iron and chromium. A 0.6553-g sample was dissolved and…

A: The question is based on the concept of quantitative estimation. we are estimating amount of…

Q: If, at equilibrium, the solution prepared in Problem #1 has an absorbance of 0.36, what is the…

A: The absorbance of a solution directly related to the type of solute and concentration of solute.

Q: 7.00 mL of 8.00 x 103 M Fe(NO3)3 (8.00 times 10 to the minus 3rd power M Fe (NO3)3) is added to 6.00…

A: Total concentration of [Fe(SCN)2+] at equilibrium = 1.00×10-4 Thus the concentration of Fe3+ at…

Q: 7.00 mL of 5.00 x 10-3 M Fe(NO3)3 (5.00 times 10 to the minus 3rd power M F e (NO3)3) is added to…

A:

Q: 8.00 mL of 5.00 x 10-3 M Fe(NO3)3 (5.00 times 10 to the minus 3rd power M F e (NO3)3) is added to…

A: Given that : Volume of Fe(NO3)3 = 8.00 mL Concentration of KSCN = 5.00 x 10-3 M Volume of KSCN =…

Q: xt of cis-K[Cr(C204)2(H2O)2].2H2O= 6.36 g Mt of complex used in titration= 0.3 g xolume of KMNO4…

A: Coordination compounds are molecules that contain one or more metal centers that are attached to…

Q: EDTA abstracts bismuth(III) from its thiourea complex: Bi1tu26 31 1 H2Y22 S BiY2 1 6tu 1 2H1 where…

A: The photometric titration curve involves the plot of the absorbance of a solution against the volume…

Q: What is the concentration of Ca2+? in a solution that was prepared by mixing 25.0 mL of 0.025 M Ca2+…

A: The question is Based on complexometric titrations.  we need to calculate equilibrium concentration…

Q: Analysis of ammonia via Nesslerization is based on measuring the absorbance at 420 nm of a yellowish…

A: The objective of the question is to determine the concentration of ammonia in the original 1.00 L…

Q: 1. A 1.000 g sample containing Na,C,O, (MM=134 mg/mmol) is titrated with 40.00 mL of 0.0200 M KMNO,…

A: It is an application of redox titration where a redox reaction occur between KMnO4 as titrant and…

Q: 8.00 mL of 9.00 x 10-3 M Fe(NO3)3 (9.00 times 10 to the minus 3rd power M F e (NO3)3) is added to…

A: Volume of Fe(NO3)3 = 8ml Concentratio of Fe(NO3)3 = 9×10-3M Volume of KSCN = 5ml Concentratio of…