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Interpretation
The metals which have more than one oxidation state should be determined from the given metals.
Concept introduction:
Transition element is one which can form one or more stable ions with a partially occupied d-subshell. Most of the
Oxidation state is the difference between the numbers of electrons associated with an atom in a compound.
In ions the oxidation state is the ionic charge
In covalent compounds the oxidation state corresponds to the formal charge.
In elements oxidation state is assumed to exist in the zero oxidation state.
The variable oxidation state of transition elements is due to their small energy difference between the 4s and 3d subshells.
Some elements with variable oxidation states are listed below,
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Chapter 20 Solutions
General Chemistry: Atoms First
- The following reactions all occur in a blast furnace. Which of these are redox reactions? (a) 3Fe2O3(s)+CO(g)2Fe3O4(s)+CO2(g) (b) Fe3O4(s)+CO(g)3FeO(s)+CO2(g) (c) FeO(s)+CO(g)Fe(l)+CO2(g) (d) C(s)+O2(g)CO2(g) (e) C(s)+CO2(g)2CO(g) (f) CaCO3(s)CaO(s)+CO2(g) (g) CaO(s)+SiO2(s)CaSiO3(l)arrow_forwardsniparrow_forwardHow complex compounds are applicable in: (a) electroplating of silver, gold or other noble metals (b) in photography.arrow_forward
- 3. Determine the oxidation state of the specified element in the following: (a) Cr in Cr,0,2- (c) Fe in Fe203 (b) Mn in MnO2 (d) Ag in AgClarrow_forward(a) Why do transition elements show variable oxidation states? (i) Name the element showing maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z = 30). (ii) Name the element which shows only +3 oxidation state. (b) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.arrow_forwardPlease draw the structure of the possible product for the following reaction, and how does the oxidation state of metal ion formally change in this reaction? (a) trans-Ir(CO)C((PPH3)2 + H2 → (b) H3C-Mn(CO)5 + P(CH3)Ph2 → (no gas evolved)arrow_forward
- 1. A sample of iron ore weighing 0.6428 g is dissolved in acid The iron is reduced to Fe*2 and titrated with 36.30 mL of a 0.1052 N solution of K2Cr207. (a) Calculate the percentage of iron (Fe) in the sample. (b) Express the percentage as Fe,03 rather than Fe. Hint: The reaction of Fe2+ with Cr,0,2 involves one electron to oxidize it to Fe*.arrow_forwardThe oxidation state of chromium in CrAsO4 is: (a) 0 (b) +1 (c) +2 (d) +3 (e) -3arrow_forwardWhat is the highest oxidation state for (a) Nb; (b) Y; (c) Tc?arrow_forward
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
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