Download Chemistry Lab Final Exam Q&A: Qualitative Analysis and Cation Identification and more Study notes Advanced Education in PDF only on Docsity!
answers
K2Cr2O7 color - correct answer ✅orange K2Cr2O7 + NaOH color - correct answer ✅Yellow K2Cr2O7 + BaCl2 Color - correct answer ✅Orange Adding heat to PbCl2 - correct answer ✅Equation shifts right Adding Na2CO3 to PbCl2 - correct answer ✅White ppt and shifts right Adding HNO3 to PbCl2 - correct answer ✅Shifts completely to the right Adding Na2S to PbCl2 - correct answer ✅Black ppt and shifts right Adding KSCN to Fe(NO3)3 - correct answer ✅Dark orange Beer-Lambert Law - correct answer ✅A=ϵbC What is A - correct answer ✅absorption What is ϵ - correct answer ✅Molar absorptivity (M-1 * cm_ What is b - correct answer ✅Path length
answers
What is C - correct answer ✅concentration Group 1 cations - correct answer ✅Ag+ Hg2+ Pb2+ Group 2 cations - correct answer ✅Cu2+ Pb2+ Zn2+ Ni2+ Group 3 cations - correct answer ✅Cd2+ Al3+ Fe3+ Fe2+ Group 4 cations - correct answer ✅Ba2+ Cu2+ Sr2+ Group 5 Cations - correct answer ✅NH4+ K+ Na+ AgCl PPt - correct answer ✅white PbCrO4 PPt - correct answer ✅Yellow Separating Ag+ and Pb+ - correct answer ✅Add HCl then heat and centrifuge Identifying Pb2+ (Group 2) - correct answer ✅Add H2SO4 and heat, white ppt forms Identifying Cu2+ - correct answer ✅Add NH3 and black ppt
answers
Test of Na+ - correct answer ✅Yellow flame Test of K+ - correct answer ✅Violet flame with cobalt glass Group 1 test - correct answer ✅Forms ppt when treated with HCl Group 2 test - correct answer ✅H2S in acidic solution Group 3 test - correct answer ✅H2S in Basic solution Group 4 test - correct answer ✅Na2CO Group 5 test - correct answer ✅Litmus and flame test Soluble ions - correct answer ✅Group 1 metals, NH4+, NO3-, C2H3O2- Halogens are soluble except with... - correct answer ✅Hg, Ag, Pb Sulfates are soluble except - correct answer ✅When combined with Ag+, Ca2+, Sr2+, Ba2+, Hg2 2+, Pb2+ S2- is insoluble except with - correct answer ✅NH4+, group 1 cations, Ca2+, Sr2+, and Ba2+
answers
OH- are insoluble except with - correct answer ✅Alkali metals (Group I) and NH4-
