Zadania z chemii IB HL

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Nickel(II) sulfate solution is green. Deduce the most suitable wavelength for this colorimetry, using section 15 of the data booklet.

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In the first step, manganese(III) ions formed from the manganate(VII) are complexed by ethanedioate ions. $\ce{[Mn(H2O)6]^3+(aq) + 2C2O4^2-(aq) -> [Mn(C2O4)2(H2O)2]^-(aq) + 4H2O(l)}$ (i) Deduce the oxidation state of carbon in $\ce{[Mn(C2O4)2(H2O)2]^-}$ . (ii)…

An aqueous solution of nickel(II) sulfate, which contains the $\ce{[Ni(H2O)6]^2+}$ ion, is green. Which statement explains the origin of this colour? A. Red light is absorbed when electrons are promoted between the split d orbitals of the nickel ion. B. Red…

Anhydrous nickel(II) chloride is yellow, whereas magnesium chloride is white. (i) State nickel's condensed electron configuration. (ii) In terms of electron configuration, state why nickel(II) chloride is a coloured compound. (iii) Nickel(II) chloride absorbs…

Aqueous nickel(II) ions, $\ce{[Ni(H2O)6]^2+}$ , appear green. Which statements correctly account for this colour? I. Red light is absorbed when an electron is promoted from the lower to the higher set of split d-orbitals. II. Green light is emitted when…

Which ion is likely to form a coloured aqueous solution, based on its electron configuration? A. $\ce{Ag+}$ B. $\ce{Ti^4+}$ C. $\ce{Cd^2+}$ D. $\ce{Cr^3+}$

Chloride ions can act as ligands towards transition metal ions. Three compounds of chromium that differ in the number of chloride ions bonded directly to the chromium ion have the formulas and colours shown. Compound Colour $\ce{[Cr(H2O)6]Cl3}$ violet…

Aqueous solutions of nickel(II) sulfate, which contain $\ce{[Ni(H2O)6]^2+}$ ions, are green. Use section 15 of the data booklet. Which statement explains the colour? A. Green light is absorbed when an electron is promoted between the split 3d orbitals. B.…