Nickel and copper ores are generally sulfides, whereasaluminum ore is an oxide. Explain this observation on thebasis of the hard/soft acid/base concept.

Q: Classify each of the following hydride compounds as a solid, liquid, or gas at room temperature.…

A: In the list provided, all of the hydride compounds are in a gaseous state at room…

Q: Given MnO2, FeCl3, Pt, and Ni, which would you select for decomposing KClO3 to give O2?

A: Catalyst is chemical substance that enhance the rate of chemical reaction but itself remain…

Q: Using the periodic table to locate each element, write the electron configuration of (a) V; (b) Y;…

A: Periodic table represents the systematic arrangement of elements in which the properties of these…

Q: group 3 cations

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Q: Assign a reason for each of the following observations:(i) The transition metals (with the exception…

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Q: In some reactions, Be behaves like a typical alkaline earth metal; in others, it does not. Complete…

A: To find: Complete and balance the given equation and  Determination of reaction in which Be behave…

Q: Discuss the following structure of AB2 and ABO3 type oxides in detail with proper diagrams and…

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Q: Elemental Li and Na are prepared by electrolysis of a molten salt, whereas K, Rb, and Cs are…

A: a) Aqueous salt solutions are mixtures of ions and water. When two half-reactions are possible at an…

Q: Silicate [SiO4] 4- and Phosphate [PO4]3- anions seem to be quite similar when briefly viewed.…

A: The mineral may be defined as any naturally occurring inorganic solid that has a definite chemical…

Q: Give a brief descriptive comparison of super oxides, peroxides and ordinary basic oxides.

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Q: A sample of pyrolusite weighing 0.6000 g is dissolved in a solution containing 5.00 mL of 6.00 N…

A: The oxidising power can be determined by the moles of electrons consumed in the reaction as…

Q: Why is beryllium carbonate unusually unstable thermally as compared to the other carbonates of this…

A: Beryllium belongs to group 2 in the periodic table. The carbonates of this group are - BeCO3, MgCO3,…

Q: Write a balanced net ionic equation for each of the followingreactions: (a) Dilute nitric acid…

A: (a) The balanced net ionic equation for dilute nitric acid reacts with zinc metal with formation of…

Q: A pyrite rock is mainly composed of FeS2 and inert. If a pyrite rock contains 48% Sulfur, what is…

A: the pyrite rock has 48% suphur, and rest iron and inert FeS2. inert therefore,  iron and inert…

Q: Predict the structure of each of the following silicate minerals (network, sheets, double chains,…

A: a) In apophyllite (KCa4(Si8O20)F.8H2O), the oxygen and silicon ration is 2.5:1. From the table, the…

Q: what is the role of silica in the metallurgy of copper?

A: The most important ore of copper found on the earth is the copper-pyrite ore whose chemical formula…

Q: Describe the following :(i) The role of cryolite in electro metallurgy of aluminium.(ii) The role of…

A: In the extraction of pure metals, certain compounds or derivatives are used to ease the reaction and…

Q: Complete and balance the following:(a) NaHSO4(aq)+ NaOH(aq) →(b) S₈(s) +excess F₂(g)→ (c) FeS(s)…

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Q: Some of the water on Earth was formed by reactions of iron and silicon oxides and methane. Write the…

A: To write the balanced  equation for the reaction of ferric oxide and methane

Q: State a reason for each of the following statements: (i) Fluorine never exhibits any positive…

A: Cations are larger in size when compared to anions. Fluorine being the most electronegative atom has…

Q: Write a chemical formula for each compound or ion,and indicate the oxidation state of the group 5A…

A: Solution: a)Phosphate ion: Chemical formula of phosphate ion is PO43-. Phosphorus (P) is the 5A…

Q: (a) What is the lanthanide contraction? (b) How does it affectatomic size down a group of transition…

A: Lanthanoid contraction, in chemistry, is the steady decrease in the size of the atoms and ions of…

Q: Ammonia and potassium iodide solutions are added to an aqueous solution of chromium(III) nitrate. A…

A: Given , CrO3 formed = 0.0203 g sample of compound = 0.105 g

Q: A solution of potassium chloride is neutral whereas a solution of bismuth (III) chloride is quite…

A: Potassium chloride (KCl) is the salt of a strong acid, HCl and strong base, KOH. Potassium ions (K+)…

Q: Although the ClO4- and IO4- ions have been known for along time, BrO4- was not synthesized until…

A: Applying concept of synthesis of perbromate ion .

Q: (a) Mention the optimum conditions for the industrial manufacture of ammonia by Haber’s process. (b)…

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Q: A common method for producing a gaseous hydride is totreat a salt containing the anion of the…

A: A gaseous hydride can be produced by treating the salt with a strong acid and even a weak acid like…

Q: There have been some predictions that element 114 willbe relatively stable in comparison with many…

A: The electronic configuration for 114 elements can be given as follows: [Rn] 5f14 6d10 7s2 7p2 It is…

Q: Alkaline earth metals are involved in two key diagonal rela-tionships in the periodic table. (a)…

A: (a) Two alkaline earth metals; Be and Mg exhibits diagonal relationship. The pair of elements are…

Q: Although thermodynamically feasible, in practice, magnesium metal is not used for reduction of…

A: The objective of the question is to explain the reason that although thermodynamically feasible in…