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Transition Metal Colour(AQA)

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mejebivu's version from 2015-05-14 17:59

Section 1

Question Answer
Fe(H2O)6 2+Pale Green Solution
Cr(H2O)6 2+Blue Solution
Co(H2O)6 2+pink solution
Cu(H2O)6 2+blue solution
Al(H2O)6 3+colourless solution
Fe(H2O)6 3+Purple solution
memorize

Section 2

Question Answer
Al(H2O)6 3+ plus limited NaOHwhite ppt
Fe(H2O)6 3+ plus limited NaOHbrown ppt
Cr(H2O)6 3+ plus limited NaOHgreen ppt
Co(H2O)6 2+ plus limited NaOHblue ppt
Fe(H2O)6 2+ plus limited NaOHGreen ppt. it turns brown with exposure in air
Cu(H2O)6 2+ plus limited NaOHblue ppt
memorize

Section 3

Question Answer
Al(H2O)6 3+ plus excess NaOHcolourless solution
Cr(H2O)6 3+ plus excess NaOHGreen solution
Co(H2O)6 2+ plus excess NaOHblue solution
memorize

Section 4

Question Answer
Al(H2O)6 3+ plus limited NH3white ppt
Fe(H2O)6 3+ plus limited NH3brown ppt
Cr(H2O)6 3+ plus limited NH3green ppt
Co(H2O)6 2+ plus limited NH3blue ppt
Fe(H2O)6 2+ plus limited NH3green gelatinous ppt. turn brown with exposure in air
Cu(H2O)6 2+ plus limited NH3blue ppt
memorize

Section 5

Question Answer
Cr(H2O)6 3+ plus excess NH3Green solution
Co(H2O)6 2+ plus excess NH3Yellow Solution
Cu(H2O)6 2+ plus excess NH3deep blue solution
memorize

Section 6

Question Answer
Al(H2O)6 3+ plus limited Na2CO3white ppt with effervescence
Fe(H2O)6 3+ plus limited Na2CO3brown ppt with effervescence
Cr(H2O)6 3+ plus limited Na2CO3green ppt with effervescence
Co(H2O)6 2+ plus limited Na2CO3pink/ purple ppt
Fe(H2O)6 2+ plus limited Na2CO3Green ppt
Cu(H2O)6 2+ plus limited Na2CO3blue/ green ppt
memorize

Section 7

Question Answer
VO2+Yellow
VO2+Green
V3+Blue
V2+Violet
memorize

Section 8

Question Answer
CrO4 2-Yellow
Cr2O7 2-Orange
Cr3+Green
Cr2+Blue
memorize