Can someone explain to me two possible objectives of this lab? Thank you Part B: Determining...
4) An unknown concentration of NiSO4 solution is to be determined by colorimetric analysis using a spectrophotometer. The standard solutions are prepared as the following: 2.00 mL (the same procedures for 3.0 mL, 4.00 mL, 6.00 mL, 7.00 mL) of the stock solution of 1.00 M NİSO4 is transferred into a 25-mL volumen flask and diluted by adding distilled water to the mark line. The spectrophotometer is calibrated at the wavelength of 635 nm. The absorbance (A) readings and the...
For Part A of the Equilibrium experiment, you will be preparing several standard solutions for the Beer's Law plot Using the information given in the Worksheet for Equilibrium Lab , answer the following questions. (a) What is the initial Fe3+ concentration of all of the solutions? 1.00 xM (b) What is the initial SCN1-concentrations of Solutions #1A - #5A? Solution #1A 1#1A | 1.00 Solution #2A 1.50 Solution #3A 2.00 Solution #4A2.50 Solution #41 2.50 M Solution #54 3,00 xM...
Could you please help me with calculating the initial concentrations, and please tell me if I did table 4 correctly. I would like to see one or two calculations for the second bullet so I can figure out how to do them all. Thank you! 13. Use a 3.00 mL pipette to deliver 0.0020 M Fe(NO3)3 solution and burettes to deliver the required volumes of KSCN solution and DI water into clean and dry test tubes. Note that this set...
please correct me If I did anything wrong. im very confused on this. • Determining k in Beer's Law 2. Determining the equilibrium constant Test Tube No. Absorbance Test Tube No. Absorbance 0,060 이79 0.253 0319 0.400 0.120 0.268 0.361 0.461 0.695 Post Laboratory Questions 1. Complete the following table and calculate k-value for the Beer's Law. All concentrations should be in M. [Fe(SCN)2) Absorbance CA Test Tube No. Diluted Fe(NO3)2 (mL) 0 . 2 3 4 s Reference 1.0...
2. Calculate the concentrations of solutions 1-7 from the procedure step 2. Show one sample calculation. Test Tube # Concentration (M) 2. Prepare one solution at a time by pipeting the following volumes into a small beaker for mixing, then transfer the solution to the appropriate test tube. Test Tube No. 0.150 M COCI, (m.) 2.00 4.00 5.00 6.00 7.00 8.00 10.00 Distilled H,O (mL) 8.00 6.00 5.00 4.00 3.00 2.00 0.00
EQUILIBRIUM OF A METAL COMPLEX ION Part 2: Determination of the Equilibrium Constant 1. Write the balanced chemical equation for the reaction we will be studying in this experiment and its associated equilibrium constant expression. 2. What analytical technique will we be using to measure concentrations? Which species can we measure with this technique? State Beer's Law and define its terms. 3. 4. 5. The following data were collected by a student preparing standards for a Beer's Law plot Discuss...
Beer's Law & Spectroscopy Practice Problems Show all work to receive full credit 100.0 1. The following data were collected from a colorimeter with solutions of manganese (I) chloride [a] Determine the absorbance of each of these standard Concentration (M) % Transmittance solutions, using A-log%T/100). 0.000 [b] Graph A vs. c. 0.010 96.6 [] By interpolating the graph, determine the concentration of an unknown manganese (II) chloride solution that transmits 0.030 90.2 85% of the light through this colorimeter 0.050...
PROCEDURE A. ABSORBANCE SPECTRA 1. Obtain three cuvettes. Add-2mL of the following samples to them: red dye, blue dye, yellow dye. 2. Obtain a spectrum for each dye according to the provided directions (water is the blank). 3. For each of the three dyes (red, yellow, and blue) record the wavelength for the largest peak in the visible range (380 nm to 750 nm), Record this in the data table below. Save the red dye for part B. 4. Identify...
solve all 3 dont waste my answer 1. Check Beer's Law by plotting absorbance vs molar concentration using 2. Is Beer's Law valid for this system? Explain your answer. 3. If Beer's Law is valid, the value of "E" should be constant. Use A-ECPL or E = A/(EL) and the data from Table II to calculate values of E for the five solutions below. The value of L is normally 1 cm so E - A/C in this experiment. Table...
Can't figure out the concentration of the complex of solns. 10, 11, 12, 13, & 14. Modern Experimental Chemistry Chemistry 153 The Iron(III) Thiocyanate Complex Purpose of the Experiment To determine the chemical formula of a complex ion and measure its formation equilibrium constant Equipment Spectro Vis spectrophotometer and LabQuest, cuvette, 25-mL buret (3), ring stand, buret clamp (2), 50-mL beaker (3), small plastic beakers Reagents SCN, as KSCN, 0.00200 M solution Fe; as Fe(NO), 0.00200 M solution and a...