REACTION TYPES, REPORT Student Name: EQUATIONS AND QUALITATIVE ANALYSIS Lab Day:
ID: 483001 • Letter: R
Question
REACTION TYPES, REPORT Student Name: EQUATIONS AND QUALITATIVE ANALYSIS Lab Day: A. Qualitative analysis of known solutions (spottesting) Table 1: Report final colour, then (ii state either precipitate (ppt) and amount or colour change (cc), or no reaction (NR) (2 marks) Test Solution Test Reagent added Krcro. KSCN NH, (aq) DMG HCI Lead (II) Nitrate yellow White White white PPT L cc L PPT s PPT M PPT s PPT s Iron (III) Nitrate Orange Blood red Yellow Orange YELLOW YELLOW Nickel (II) Nitrate NiR PPT L PPT S CC L CC L ORANGE Blue PURPLE PINK NR Silver (I) Nitrate PPT L PPT L Blood red WHITE NR BLACK WHITE Barium Nitrate BaF PPT LT PPT L PPT S NR WHITE light yellow NR wHITE H20 Negative Control Unknown Sample unknown Sample H: dentity of Unknown cationsExplanation / Answer
Nickel (II) = Ni2+(aq)
Ammonia = NH3(g)
The reaction
Ni2+(aq) + 2NH3(aq) + 2H2O --> Ni(OH)2(s) + 2NH4+(aq)
color change is due to dissapearance of Ni2+ ions
Q2.
AgNO3 + KSCN:
Ag+(aq) + SCN-(aq) <-> AgSCN(s)
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