CATION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) OBSERVATIONS Excess NH3 NVR KSCN NVR K4Fe(CN)6 NVR K3Fe(CN)6 NVR Na2C2O4 NVR NaOH (in evaporating dish) Litmus paper: red to blue ANION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) OBSERVATIONS HNO3, Fe(NO3)3 Blood red aqueous layer; colorless toluene layer HNO3, KMnO4 Peach aqueous layer; colorless toluene layer (to the ppt) CH3COOH White ppt does not dissolve MgCl2 NVR 6M H2SO4, FeSO4, 18M H2SO4 NVR Select one or more: NH4+ CO32- Fe3+ SO42- Cu2+ NO3- Ca2+ I- Br- PO43- Zn2+ SCN-

CATION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) OBSERVATIONS Excess NH3 NVR KSCN NVR K4Fe(CN)6 NVR K3Fe(CN)6 NVR Na2C2O4 NVR NaOH (in evaporating dish) Litmus paper: red to blue ANION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) OBSERVATIONS HNO3, Fe(NO3)3 Blood red aqueous layer; colorless toluene layer HNO3, KMnO4 Peach aqueous layer; colorless toluene layer (to the ppt) CH3COOH White ppt does not dissolve MgCl2 NVR 6M H2SO4, FeSO4, 18M H2SO4 NVR Select one or more: NH4+ CO32- Fe3+ SO42- Cu2+ NO3- Ca2+ I- Br- PO43- Zn2+ SCN-

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter32: Radiochemical Methods

Section: Chapter Questions

Problem 32.6QAP

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CATION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) Excess NH3 KSCN K4Fe(CN)6 K3Fe(CN)6 Na₂C₂04 NaOH (in evaporating dish) ANION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) HNO3, Fe(NO3)3 HNO3, KMnO4 (to the ppt) CH3COOH MgCl2 6M H₂SO4, FeSO4, 18M H₂SO4 POSSIBLE ION(S) PRESENT? OBSERVATIONS brown ppt Blood red complex Prussian blue ppt NVR NVR Litmus paper: red to blue OBSERVATIONS Yellow aqueous layer; pink toluene layer Yellow-brown aqueous layer; pink toluene layer N/A NVR NVR
Determine the possible ion/cation present Draw the flowchart of it CATION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) OBSERVATIONS Excess NH3 NVR KSCN NVR K4Fe(CN)6 NVR K3Fe(CN)6 NVR Na2C2O4 NVR NaOH (in evaporating dish) Litmus paper: red to blue ANION CONFIRMATORY TEST OBSERVATION ADDED REAGENT(S) OBSERVATIONS HNO3, Fe(NO3)3 Blood red aqueous layer; colorless toluene layer HNO3, KMnO4 Peach aqueous layer; colorless toluene layer (to the ppt) CH3COOH White ppt does not dissolve MgCl2 NVR 6M H2SO4, FeSO4, 18M H2SO4 NVR POSSIBLE ION(S) PRESENT? Select one or more: NH4+ CO32- Fe3+ SO42- Cu2+ NO3- Ca2+ I- Br- PO43- Zn2+ SCN-
M (2022-23) Unit 1: Mole Concept, Unit 4 (FR) (Version 2) Assessment: Chemical Reactions 0.90 0.80- 0.70- 3 0.60 0.50- 0.40- 0.30- Absorbance 2. To spectrophotometrically determine the mass percent of cobalt in an ore containing cobalt and some inert materials, solutions with known [Co²+] are prepared and the absorbance of each of the solutions is measured at the wavelength of optimum absorbance. The data are used to create a calibration plot, shown below. 0.20 0.10- 0.00+ ㅏ 0.005 0.010 34 0.015 Concentration (M) .04 co₂ 100- pertoc A 0.630 g sample of the ore is completely dissolved in concentrated HNO3(aq). The mixture is diluted with water to a final volume of 50.00 mL. Assume that all the cobalt in the ore sample is converted to Co²+ (aq). (a) What is the [Co²+] in the solution if the absorbance of a sample of the solution is 0.74 ? (b) Calculate the number of moles of Co²+ (aq) in the 50.00 mL solution. (c) Calculate the mass percent of Co in the 0.630 g sample of the ore. Answer…
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ADDED REAGENT(S)	OBSERVATIONS
HNO₃, Fe(NO₃)₃	Blood red aqueous layer; colorless toluene layer
HNO₃, KMnO₄	Peach aqueous layer; colorless toluene layer
(to the ppt) CH₃COOH	White ppt does not dissolve
MgCl₂	NVR
6M H₂SO₄, FeSO₄, 18M H₂SO₄	NVR

ADDED REAGENT(S)	OBSERVATIONS
Excess NH₃	NVR
KSCN	NVR
K₄Fe(CN)₆	NVR
K₃Fe(CN)₆	NVR
Na₂C₂O₄	NVR
NaOH (in evaporating dish)	Litmus paper: red to blue