Question

How to solve for the cobalt concentration [Co]= __M and percentage in Co coordination compound and (v)

(1) In Co-analysis lab a sample of the cobalt compound weighing 1.1427 gram was heated until color change occurred followed by the addition of 10.0 mL of water, and 1.0 mL of sulfuric acid. The solution was transferred quantitatively to a 100.00 mL Volumetric flask, shaken and filled to the mark with water. A sample of this solution gave a percent transmittance reading of 59.3% when put in a spectrophotometer. The absorbance of this sample is = 59.3% Use the least squares line (Trendline) from the Beer's Law plot below to determine the concentration of cobaltion in the diluted solution. The concentrations are in the same units as in the experiment you performed. Excel Trendline: y = 4.990[x] - 2.400 x 100 (in) The cobalt concentration. [Co]= 58.9 M and (iv) The percentage cobalt in the Co coordination compound analyzed= 24 % V) Assuming that the above determinations of %CI and Co are accurate within 1.1%, the amount of NH3 present in this cobalt coordination compound (h) Use the percentages you obtained above and determine the empirical (molecular formula of the coordination compound. Provide the following: mol Cor mol CIE mol NH- (6) For the general formula Co.(NH), Cly, give the subscripts, x 1 = 5 .2-3 Please answer all parts of the question.

Answer 1

plete Answer: ace 1 absorbons of sample & 59.3% U excle trandline - y = u.990 (m) - 2.400 x 10 The Equata of Beer's law to A=EMCI Az Abserboncc. - Conc. En = Molar Exhachas Coifficat In Path length of Icm. Compare this as olano y = mxtc. x=Cone. At Em C + to y = mx + c. G= A = Absorbance. Put value of y=A and Calculare & y = 59.3% = 0.593. 0.593 = 4.990%-24x10-3 0.593 + -4610-3 4-990X 6.990 n=0.5954 0 0.1193 M This is cone. OV) 4. Cobalt. Mary of Complex roles Molanty - volumen - 1.14279 weight xlooo - M. Mas an 0.193 = 1627 x1000 M. HOM X 100 = 95.18. 1427 (xlo 0.1143 Molag Mon =

1992 Cobalt Molar Mas 58.93 o 58.23 58.93 x 100 10 7. of cobalt in laiple & = 95.18 co = 0.6152 X100 [ % co = 61.52% с. осуг OP1 (1) for this post you have to Calente socle from above Oushas. after that. subtract the (7. Co ty ce) from totul Mars 95.78 - (%.co + Yce) = (% puz to Put value of both and get the value of %. Why 2. 00 I hope you understand the Solunan let me know If you have any doubt. and if you not able to find the answer Put value of V. e la Cornat Sechan and I will soluc.
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