Transition Metals

Description

Flashcards on Transition Metals, created by Lewis Tonge on 27/05/2018.
Lewis Tonge
Flashcards by Lewis Tonge, updated more than 1 year ago
Lewis Tonge
Created by Lewis Tonge over 6 years ago
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Resource summary

Question Answer
Cu^2+ in solution [Cu(H2O)6]^2+ / Pale Blue
Mn^2+ in solution [Mn(H2O)6]^2+ / Very Pale Pink
Fe^2+ in solution [Fe(H2O)6]^2+ / Pale Green
Fe^3+ in solution [Fe(H2O)6]^3+ / Pale Yellow
Cr^3+ in solution [Cr(H2O)6]^3+ / Pale Purple or [Cr(H2O)5(SO4)]^+ / Green
Cu^2+ with OH^- Cu(OH)2 / Pale Blue ppt.
Cu(OH)2 left standing in air No change
Mn^2+ with OH^- Mn(OH)2 / Light Brown ppt.
Mn^2+ left standing in air Oxidises to Mn(OH)3 Darkens to Brown ppt.
Fe^2+ with OH^- Fe(OH)2 / Green ppt.
Fe(OH)2 left standing in air Oxidises to Fe(OH)3 Darkens to Orange-Brown ppt.
Fe^3+ with OH^- Fe(OH)3 / Orange-Brown ppt.
Fe(OH)3 left standing in air No change
Cr^3+ with OH^- Cr(OH)3 / Grey-Green ppt.
Cr(OH)3 left standing in air No change
What ion reacts with excess OH^- Cr^3+
Cr^3+ in excess OH^- [Cr(OH)6]^3- Dark Green solution (all other TM ions are insoluble)
Cu^2+ with NH3 Cu(OH)2 Pale Blue ppt.
Mn^2+ with NH3 Mn(OH)2 Brown ppt.
Fe^2+ with NH3 Fe(OH)2 Green ppt.
Fe^3+ with NH3 Fe(OH)3 Orange-Brown ppt.
Cr^3+ with NH3 Cr(OH)3 Grey-Green ppt.
What two ions react in excess NH3? Cu^2+ and Cr^3+
Cu^2+ with excess NH3 [Cu(NH3)4(H2O)2]^2+ Deep Blue solution
Cr^3+ in excess NH3 [Cr(NH3)6]^3+ Purple solution
What ion reacts reacts with conc. HCl Cu^2+
Cu^2+ with conc. HCl [CuCl4]^2- Yellow solution
What colour is MnO4^2- in solution? Deep Purple
What colour is Cr2O7^2- in solution? Orange
What colour is CuI ppt.? White
What colour is I2 with starch? Blue/Black
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