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Concept explainers
(a)
Interpretation:
The separation of ions
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: Oxidative state is a number which depicts that how many electrons gets lost or gained by the respective atom.
Balanced chemical equation: The
(b)
Interpretation:
The separation of ions
Concept Introduction:
Transition element is one which can form one or more stable ions with a partially occupied d-subshell. Most of the transition elements are metals and majority of elements exists in various oxidation states also.
Oxidation state: Oxidative state is a number which depicts that how many electrons gets lost or gained by the respective atom.
Balanced chemical equation: The chemical reaction is considered as balanced if all the type and the number of atoms present in reactant side of the chemical reaction equals to the type and the number of atoms present in the product side of the reaction.
(c)
Interpretation:
The separation of ions
Concept Introduction:
Transition element is one which can form one or more stable ions with a partially occupied d-subshell. Most of the transition elements are metals and majority of elements exists in various oxidation states also.
Oxidation state: Oxidative state is a number which depicts that how many electrons gets lost or gained by the respective atom.
Balanced chemical equation: The chemical reaction is considered as balanced if all the type and the number of atoms present in reactant side of the chemical reaction equals to the type and the number of atoms present in the product side of the reaction.
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Chapter 20 Solutions
General Chemistry: Atoms First
- (a) Draw a Lewis dot and cross structure (including any lone pairs) for a NBr3 molecule and determine the shape of the molecule and number of valence electrons. (b) Six ammonia ligands form a complex ion with Co²+. What is the overall charge of the complex ion? Write the formula for the complex ion. What is the coordination number of the complex ion? Explain how ammonia ligands form a complex ion with Co²+? What is the geometry of the complex ion? Would you expect the complex to be coloured? Explain why? i. ii. iii. iv. V. vi.arrow_forwardPredict which member of each pair produces the more acidic aqueous solution: (a) K+ or Cu2+(b) Fe2+ or Fe3+, (c) Ga3+ or Al3+ Explain.arrow_forward1. 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_forward
- 1. A sample of iron ore weighing 0.6428 g is dissolved in acid The iron is reduced to Fe* and titrated with 36.30 mL of a 0.1052 N solution of K,Cr207. (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_forwardWrite the electron configurations for each of the following elements and its ions:(a) Ti(b) Ti2+(c) Ti3+(d) Ti4+arrow_forwardExplain how the diphosphate ion, [O3P−O−PO3]4−, can function as a water softener that prevents the precipitation of Fe2+ as an insoluble iron salt.arrow_forward
- [Fe(H2O)6]3+ (aq) + SCN1- ↔ Fe(H2O)5SCN]2+(aq) + heat yellow red For the above reaction, describe using Le Chatelier’s Principle what changes (color changes and shifts) would occur when each stress is applied to this equilibrium. Explain your answers. a) Add KSCN(aq) b) Decrease temperature c) Add AgNO3, which causes AgSCN to precipitate out.arrow_forwardWhat chemical tests would you use to distinguish between (a) [Co(NH3)5 Br] [SO4] and [Co(NH3) 5 (SO4)] Br, and (b) [CrCl₂ (OH₂)4] Cl-2H₂O and [CrCl(OH₂)5]Cl₂ H₂O? (c) What is the relationship between these pairs of compounds? (d) What isomers are possible for [CrCl₂ (OH₂)4]?arrow_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_forward
- In the following chemical reaction what is the concentrations of [H3O+] in a solution that is 0.00045 M [Al(H2O)6]3+. Assume that the [Al(H2O)6]3+ dissociates 100% completely and assume 1 Liter of solution. [Al(H2O)6]3+ + 3H2O ↔ [Al(H2O)3(OH)3]2+ + 3H3O+arrow_forwardFor each of the following reactions, identify the acid and the base. Also indicate which acid-base definition is most applicable. Fe3+ + 6 SCN– →[Fe(SCN)6]3– HClO4 + (CH3)3N → (CH3)3NH+ + ClO4– [Co(H2O)6]2+ + 4 HCl → [CoCl4]2– + 4 H3O+ + 2 H2Oarrow_forwardPredict the products of the following reactions and balance the equations.(a) Zn is added to a solution of Cr2(SO4)3 in acid.(b) FeCl2 is added to a solution containing an excess of Cr2O72− in hydrochloric acid.(c) Cr2+ is added to Cr2O72− in acid solution.(d) Mn is heated with CrO3.(e) CrO is added to 2HNO3 in water.(f) FeCl3 is added to an aqueous solution of NaOH.arrow_forward
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