Category: Inorganic chemistry questions
Uses of potassium permanganate VII
Potassium Manganate (VII), KMnO4 - It used as an oxidizing agent to oxidize alcohols and aldehydes to carbonyl compounds and carboxylic acids respectively. - it ... Read More
What are the properties of manganese as a transition element?
Properties of manganese as a transition element Forms colored compounds; for instance Mn7+ is purple Has variable oxidation states; +2, +3, +4, +5, +6, +7 ... Read More
Write electron configuration of manganese
Electron configuration of manganese 4s23d5 Please Subscribe to promote this website. Subscription is free Share with a friend Thank you so much Read More
Qualitative analysis of iron (II) and iron (III) ions
Qualitative analysis of Fe2+ salt Common iron II salts include Ferrous sulphate: FeSO4.7H2O Ammonium ferrous sulphate (NH4)2Fe(SO4)2.6H2O Ferrous oxalate. FeC2O4 Qualitative analysis of Fe2+ salt ... Read More
Methods of preventing rusting
Methods of preventing rusting (a) Keeping objects in dry places. (b) Painting (c) Oiling (d) Greasing (e) Coating with another metal. (f) Zinc plating Please ... Read More
Explain why iron (III) ions are more stable than iron (II) ions
Explain why iron (III) ions are more stable than iron (II) ions Oxidation state Fe3+ (3d5) is more stable than F2+ (4s13d5) because Fe3+ has ... Read More
Describe the extraction of iron from one its ore
Extraction of iron from hematite,Fe2O3 Main Impurities Silica, SiO2 Alumina, Al2O3 Procedure Iron ore, lime stone and coke in the correct proportions are reacted with ... Read More
state the properties of iron as a transition element
Properties of iron as a transition element Forms colored compounds; for instance Fe2+ is green Has variable oxidation states; +2, +3, Forms complexes, e.g. Fe(CN)63-. ... Read More
Electron configuration of iron
Electron configuration of Iron 3d64s2 Please Subscribe to promote this website. Subscription is free Share with a friend Thank you so much Read More
Explain why concentrated hydrofluoric acid is a stronger acid than dilute hydrofluoric acid.
Explain why concentrated hydrofluoric acid is a stronger acid than dilute hydrofluoric acid Both concentrated and dilute acid solution partially ionize in water to form ... Read More
State and explain the trend in melting point of group 7 elements
State and explain the trend in melting point of group 7 elements The melting points of group 7 elements increase down the group due to ... Read More
Explain why the acidity of halogens acids decrease in the order HI>HBr>HCl although their ionic characters increase in the reverse order.
Explain why the acidity of halogens acids decrease in the order HI>HBr>HCl although their ionic characters increase in the reverse order. The strengths of these ... Read More
Reaction of bromine and iodine with sodium hydroxide
Reaction of bromine and iodine with sodium hydroxide Bromine and iodine react with sodium hydroxide solution to give the halide and halate (V): 6OH- (aq) ... Read More
Reaction of chlorine with sodium hydroxide and alkalis
Reaction of chlorine with sodium hydroxide and alkalis Chlorine reacts with cold dilute sodium hydroxide solution to give sodium chloride and sodium chlorate (I). 2OH- ... Read More
Reaction hydrofluoric acid with silicon dioxide
Reaction hydrofluoric acid with silicon dioxide Moist hydrogen fluoride and aqueous solutions of the acid attack silica and glass, so the solution is stored in ... Read More
Reason for high reactivity of fluorine
Reason for high reactivity of fluorine It has abnormally low (F-F) bond energy by comparison with other halogens (i.e., F2, 158; Cl2, 247; Br2, 193; ... Read More
Reaction of fluorine with sodium hydroxide
Reaction of fluorine with sodium hydroxide Fluorine reacts with cold dilute solutions of alkalis to give oxygen difluoride; F2O, and with warm concentrated alkalis to ... Read More
Reaction of fluorine with water and silicon dioxide
Fluorine substitutes oxygen from silicon dioxide and water. SiO2(s) + 2F2(g) → SiF4(g) + O2(g) 2H2O(l) + 2F2(g) → 4HF(aq) + O2 (g) Please Subscribe ... Read More
Reasons for uniqueness of fluorine
Reasons for uniqueness of fluorine (i) Has small atomic radius (ii) Has high electronegativity (iii) Has abnormally low F-F bond energy (158kJ/mol) due to high ... Read More
Group 7 elements are Fluorine, chlorine, bromine, iodine
Group 7 elements are Fluorine, chlorine, bromine, iodine Members Elements Symbols Fluorine F Chlorine Cl Bromine Br Iodine I Please Subscribe to promote ... Read More
Qualitative analysis of Lead II ions
Qualitative analysis of Pb2+ Forms a white precipitate with sodium hydroxide soluble in excess Pb2+(aq) + 2OH-(aq) → Pb(OH)2 (s) + 2OH-(aq) → Pb(OH)42- ... Read More
Reactions of lead dioxide with concentrated hydrochloric acid.
Reactions of lead dioxide with concentrated hydrochloric acid. (a) Lead dioxide reacts with cold concentrated hydrochloric acid to form lead (IV) chloride PbO2 (s) + ... Read More
Reaction of silicon dioxide with HF (hydrogen fluoride)
Reaction of silicon dioxide with HF SiO2(s) + 4HF(g) → SiF4(aq) + H2O(l) SiF4(aq) + 2HF(aq) → H2SiF6(aq) Please Subscribe to promote this website. Subscription ... Read More
Reaction of silicon dioxide with NaOH (sodium hydroxide)
Reaction of silicon dioxide with NaOH SiO2(s) + 2NaOH(aq) → Na2SiO3(aq) + H2O(l) SiO2(s) + 2-OH (aq) → SiO32- (aq) + H2O (l). Please Subscribe ... Read More
Reaction of carbon monoxide with sodium hydroxide
Reaction of carbon monoxide with sodium hydroxide Carbon monoxide reacts with fused NaOH under pressure to give sodium methanoate. Methanoic acid is produced from this ... Read More
Differences between diamond and graphite
Differences between diamond and graphite The density of graphite (2.3 gcm-3) that of diamond (3.5 g cm-3) Diamond is very hard while graphite is soft ... Read More
Allotropes of carbon
Allotropes of carbon Allotropy is the existence of two or more different physical forms in the same state of a chemical element. An allotrope is ... Read More
Reasons for uniqueness of carbon
Reasons for uniqueness of carbon Has a very small atomic radius Has high electronegativity Lacks easily accessible d-orbital in its valence shell. Please Subscribe to ... Read More
Unique characteristics of carbon
Unique characteristics of carbon Forms gaseous oxides, the rest form solid oxides Note that Carbon dioxide is a gas because its molecules are bonded by ... Read More
Reaction of group (IV) with sodium hydroxide
Reaction of group (IV) with sodium hydroxide C does not react. Si Ge and Sn react liberating hydrogen and silicate (IV), germates (IV) and stannates ... Read More
Reactions of group (IV) elements with acetic or ethanoic acid
Reactions of group IV) elements with acetic or ethanoic acid C, Si Ge and Sn do not react. Pb reacts ethanoic acid in presence of ... Read More
Reactions of group (IV) elements with sulphuric acid
Reactions of group (IV) elements with sulphuric acid Dilute sulphuric acid C, Si and Ge do not react. Sn and Pb reacts dilute concentrated sulphuric ... Read More
Describe reactions of group (IV) elements with nitric acid
Reactions of group (IV) elements with nitric acid With concentrated nitric acid. C, Si, Ge and Sn react to form dioxide C(s) + 4HNO3(aq)→ CO2(g) ... Read More
Describe the reactions of group (IV) elements with hydrochloric acid
Reaction of group (IV) elements with hydrochloric acid. Carbo, Silicon, and Germanium do not react with hydrochloric acid Tin (Sn) liberates hydrogen Sn(s) + 2H+(aq) ... Read More
Describe reaction of group IV elements with water
Reaction of group (IV) elements with water Carbon does not react with cold water but reacts with steam to form water gas C(s) + H2O(g) ... Read More
Reaction of aluminium with sodium hydroxide
Reaction of aluminium with sodium hydroxide Aluminium reacts with sodium hydroxide liberating hydrogen gas. 2Al(s) + 2-OH(aq) + 6H2O(l) → 2Al(OH)4-(aq) + 3H2(g) Please Subscribe ... Read More
Describe extraction of aluminium from named ore
Extraction of Aluminium Ore: Bauxite (Al2O3.xH2O) Major impurities are Silica or SiO2 Iron salts Principles in extraction Extraction of aluminium involves removal of ... Read More
Compare the solubility and basicity of hydroxides of group II elements with the hydroxides of group (I) elements
Compare the solubility and basicity of hydroxides of group II elements with the hydroxides of group (I) elements Group II hydroxides are less soluble and ... Read More
Explain the trend in group II hydroxides
Solubility of group 2 metal hydroxides The solubility of group 2A hydroxides increases down the group from Be(OH)2 to Ba(OH)2 due to an increase in ... Read More
Reactions of group II elements with sodium hydroxide
Reactions of group II elements with sodium hydroxide Beryllium evolves H2 when reacted with sodium hydroxide solution to form a complex and hydrogen. Be (s) ... Read More
Reactions of group II elements with sodium hydroxide
Reactions of group II elements with sodium hydroxide Beryllium evolves H2 when reacted with sodium hydroxide solution to form a complex and hydrogen. Be (s) ... Read More
Reaction of group II elements with nitric acid
Reaction of group II elements with nitric acid (a) Beryllium does not react with concentrated nitric acid because it forms a layer of insoluble BeO. ... Read More
How do group II elements react with sulphuric acid under different conditions
Reactions of group II elements with sulphuric acid (i) Dilute sulphuric acid Calcium and barium react slowly with cold dilute sulphuric acid but the ... Read More
How does group II elements react with water?
Reactions of group II elements with water Beryllium has no reaction with water; Very clean Magnesium reacts slowly with water to form colorless solution ... Read More
Write outer most electron configuration of group II elements
Outer most electron configuration of group II elements ns2 Please Subscribe to promote this website. Subscription is free Share with a friend Thank you so ... Read More
Explain the tendency of group II elements to form complexes.
Explain the tendency of group II elements to form complexes. The tendency of group II elements to form complexes decreases down the group due to ... Read More
Flame test/colours for group II elements
Flame test Calcium, strontium and barium give characteristic flame coloration calcium - yellowish-red strontium - crimson barium - apple-green. Please Subscribe to promote this website. ... Read More
Explain why melting points of group II elements are higher than those of group I elements
Group 2 elements have higher melting points than group 1 elements, explain. Group II elements have higher melting points than group I elements due to ... Read More
Give one reason to explain why the elements of group II of the periodic table are strong reducing agents.
Give one reason to explain why the elements of group II of the periodic table are strong reducing agents. Have low ionization energies and can ... Read More
suggest reasons for uniqueness of beryllium
Reasons for uniqueness of beryllium A small atomic radius High electronegativity Has very high ionization energy that it hardly form Be2+ ions leading to covalent ... Read More
Explain the variation of first ionization energy in group II elements
Explain the variation of first ionization energy in group II elements First ionization energy of group 2 elements down the group down the group due ... Read More
Explain the variation of atomic radii in group II elements
Explain the variation of atomic radii in group II elements Atomic radii of group 2 elements increase down the group due (i) Increase in the ... Read More
State what is observed and equations for the reaction which takes place when potassium iodide is added to copper(II) sulphate solution
A white precipitate and brown solution 2Cu2+(aq) + 2I- (aq) → 2CuI(s) + I2(aq) Please Subscribe to promote this website. Subscription is free Share with ... Read More
Qualitative analysis of copper II ions
Qualitative analysis of copper II ions Sodium hydroxide solution Forms a blue precipitate insoluble in excess Cu2+(aq) + 2OH- (aq) → Cu(OH)2(s) Ammonia solution Forms ... Read More
Reaction of copper with hydrochloric acid
Reaction of copper with hydrochloric acid (a) Copper does not react with dilute hydrochloric acid (b) It reacts with concentrated hydrochloric acid liberating hydrogen 2Cu(s) ... Read More
Describe reactions of copper with nitric acid.
Reactions of copper with nitric acid (a) Copper does not react with very dilute nitric acid (b) With 50% nitric acid it forms copper nitrate, ... Read More
Describe how copper reacts with sulphuric acid
Reaction with sulphuric acid copper does not react with dilute sulphuric acid Copper is oxidized by hot concentrated sulphuric acid to give copper sulphate, sulpur ... Read More
Describe how copper is extracted from one of its ores
Extraction of copper from copper pyrites Concentration of the ore by floatation method The finely pulverized ore is mixed with water, containing ‘frothing’ agent (s). ... Read More
Ores of copper
Ores of copper copper pyrites, CuFeS2, copper glance, CuS, cuprite, Cu2O. Please Subscribe to promote this website. Subscription is free Share with a friend Thank ... Read More
Properties of copper as a transition or d-block element
Properties of copper as a transition or d-block element Forms colored compounds; for instance Cu2+ is blue Has variable oxidation states; +1, +2, Forms complexes, ... Read More