A LEVEL CHEMISTRY OCR A EXAM SCRIPT UPDATED COMPLETE QUESTIONS AND ANSWERS

A LEVEL CHEMISTRY OCR A EXAM SCRIPT
UPDATED COMPLETE QUESTIONS AND
ANSWERS EXPERT REVIEWED

●● Fe2+
Answer: Pale green solution


●● Fe3+, [CuCl4]2-, CrO4 2-
Answer: Yellow Solution


●● Mn2+
Answer: Pale Pink Solution


●● Cr3+
Answer: Pale Purple Solution


●● Cu(OH)2
Answer: Pale Blue PPT


●● Fe(OH)2
Answer: Green PPT which darkens on standing

,●● Fe(OH)3
Answer: Orange Brown PPT


●● Mn(OH)2
Answer: Light brown PPT which darkens on standing


●● Cr(OH)3
Answer: Grey-green PPT


●● [Cr(OH)6]3-
Answer: Dark green solution


●● Cr2O7 2-
Answer: Orange solution


●● [Cu(NH3)4(H2O)2]2+
Answer: Dark blue solution


●● [Cr(NH3)6]3+
Answer: Purple solution

, ●● I2(aq)
Answer: Brown solution


●● AgI
Answer: Yellow PPT does not dissolve in CONC NH3


●● AgBr
Answer: Cream PPT dissolves in CONC NH3


●● AgCl
Answer: White PPT dissolves in dilute NH3


●● Permanganate ion
Answer: MnO4-


●● MnO4- and Fe2+ colour change
Answer: Purple to pale pink


●● MnO4- and Fe2+ products
Answer: Mn2+ and Fe3+


●● Cu2+ and I- products