A song and a QA

1 Cool song

Aqua harp


1 QA

Given the following unknowns, identify each one, without using any other reagents or apparatus (other than test tubes). Rather interesting... but i got stuck after running out of ammonia [suans self :-(]

HCl | H2SO4 | CH3COOH | NaOH | NH3 | Pb(NO3)2 | KI | Na2CO3 | AgNO3 | Zn(NO3)2

Identify by smell
NH3
CH3COOH: vinegar smell

Identify by touch
NaOH: slippery

Mix NH3 with each sample
Pb(NO3)2: white ppt, insoluble in excess
AgNO3: light brown ppt
Zn(NO3)2: white ppt, soluble in excess

Mix Pb(NO3)2 with each unknown sample
KI: yellow ppt of PbI2

Test last 3 individually with each other
Na2CO3: Effervescence (CO2) with 2 other soln

Test last 2 remaining with AgNO3
HCl: White ppt (AgCl)
H2SO4: No rxn