Category: Inorganic chemistry

Describe how copper is extracted from one of its ores

05/16/2021 0

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

05/16/2021 2

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

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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

Write electron configuration of copper

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Electron configuration of copper 4s13d10 Please Subscribe to promote this website. Subscription is free Share with a friend Thank you so much Read More

Qualitative analysis of cobalt II salts

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Qualitative analysis of cobalt II salts Common salt: Cobalt sulphate: CoSO4 (a)With dilute sodium hydroxide solution of ammonium solution Observation Blue precipitate insoluble in excess ... Read More

State properties of cobalt as a transition element

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Properties of cobalt as a transition element a)Forms colored compounds; for instance Co2+  is pink b)Has variable oxidation states; +2, +3, c)Forms complexes, e.g. CoCl42-. ... Read More

Write electron configuration of cobalt

05/16/2021 0

Electron configuration of cobalt 4s3d7 Please Subscribe to promote this website. Subscription is free Share with a friend Thank you so much Read More

Qualitative analysis of chromium (III) salts

05/16/2021 0

Qualitative analysis of chromium (III) salts With sodium hydroxide solution: It forms a green precipitate soluble in excess Cr3+ (aq) + 3OH- (aq) → Cr(OH)3 ... Read More

Advantages of potassium dichromate over potassium permanganate in volumetric analysis

05/15/2021 0

Advantages of potassium dichromate over potassium permanganate in volumetric analysis Hydrochloric acid can be used to acidify titration involving potassium dichromate since are not strong ... Read More

Write equation for the reaction between iron(II) sulphate and  potassium dichromate (VI) in acidic medium.

05/15/2021 1

Write equation for the reaction between iron(II) sulphate and  potassium dichromate (VI) in acidic medium Cr2O72- (aq) + 14H+ (aq) + 6Fe2+ (aq)  → 2Cr3+ ... Read More

Properties of chromium as a transition element

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Properties of chromium as a transition element Forms colored compounds; for instance Cr3+ is green Has variable oxidation states; +2, +3, +4, +5, +6. Forms ... Read More

Write electron configuration of chromium.

05/15/2021 0

Write electron configuration of chromium. 4s13d5 Please Subscribe to promote this website. Subscription is free Share with a friend Thank you so much Read More

Similarities in chemical properties of Beryllium (Be) and aluminium (Al).

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Similarities in chemical properties of Beryllium (Be) and aluminium (Al). 1.  Both are passive to nitric acid. 2. Both react with NaOH solution to evolve     ... Read More

State similarities between Li and Mg

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State similarities between Li and Mg 1.  Both form normal oxides when they burn in oxygen. 4Li (s)  + O2 (g) → 2Li2O (s) 2Mg ... Read More

What is diagonal relationship?

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What is diagonal relationship? Diagonal relationship is the similarity in chemical properties between elements in the second period with elements which are lying to their ... Read More

Explain the abnormally high boiling point of ammonia (NH3).

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Explain the abnormally high boiling point of  ammonia (NH3) The boiling point of ammonia is abnormally high because it forms strong intermolecular hydrogen bonds. This ... Read More

Explain why the boiling point of beryllium chloride is 4870C and that of magnesium chloride is 14180C.

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Explain, the boiling point of beryllium chloride is 4870C and that of magnesium chloride is 14180 Be2+ has higher charge density than Mg2+ due to ... Read More

Explain why the polarizing power of group (II) elements are much higher than those of group I elements.

05/15/2021 0

Explain why the polarizing power of group (II) elements are much higher than those of group I elements. Group II elements have bigger charge and ... Read More

The elements of group II of the periodic table are harder and have higher melting points than those of group I elements. Explain

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The elements of group II of the periodic table are harder and have higher melting points than those of group I elements. Explain Group II ... Read More

Explain why carbon tetrachloride molecules are not polar while carbon trichloride is polar

05/15/2021 2

Explain why carbon tetrachloride molecules are not polar yet the bonds in carbon trichloride are polar. CCl4 is a symmetrical molecule, the dipole moments in ... Read More

(d) Explain why the transition metals of period 4 tend to have higher melting points than non-transition metals of the same period.

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Explain why the transition metals of period 4 tend to have higher melting points than non-transition metals of the same period. Transition elements have higher ... Read More

Explain the variation of melting point of group VII elements

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Explain the variation of melting point of group VII elements The melting points of the elements of group VII increases down the group due to ... Read More

State factors that affect melting points of nonmetals

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State factors that affect melting points of nonmetals size of the molecules/molecular mass shape of the molecules polarity of the molecules Please Subscribe to promote ... Read More

State the factors which affect the melting points of metals.

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State the factors which affect the melting points of metals Number of electrons its atoms contribute to form metallic bond, higher the number of electrons ... Read More

Explain what is meant by the term melting point.

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 Explain what is meant by the term melting point. It is a temperature at which a liquid is in equilibrium with a solid at a ... Read More

Pajan’s rules of covalency

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Pajan’s rules of covalency These are conditions that when possessed by cations and anions of a given molecule, make the ionic bond partially or fully ... Read More

What is polarization of an ion?

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What is polarization of an ion? Polarization is the attraction of electrons from anion by a cation in an ionic compound to form a partial ... Read More

State factors that promote formation of ionic bonds

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State factors that promote formation of ionic bonds Electronegativity or electropositivity differences between two elements must be high.   Please Subscribe to promote this website. ... Read More

State characteristics/properties of ionic compounds

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State characteristics/properties of ionic compounds They consist of ions and not molecules. They are electrolytes, i.e., when dissolved in water or when fused, conduct an ... Read More

Explain factors that affect the strength of ionic bond

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Explain factors that affect the strength of ionic bond Size of the cation and anion; ionic bonds are stronger when the size of the cation ... Read More

What is ionic bond?

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What is ionic bond? It is the electrostatic attraction between  the opposite charges on ions Please Subscribe to promote this website. Subscription is free Share ... Read More

What is a chemical bond?

05/15/2021 0

What is a chemical bond? A chemical bond is a force of attraction that keeps atoms, ions or molecules together in chemical compounds or solid. Please Subscribe to ... Read More

Explain how the spectra of a hydrogen atom provide evidence for existence of energy levels in atoms. 

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Explain how the spectra of a hydrogen atom provide evidence for existence of energy levels in atoms.  The fact that the hydrogen spectrum is a ... Read More

Explain how the spectra of a hydrogen atom are formed.

05/15/2021 0

Explain how the spectra of a hydrogen atom are formed. When a hydrogen atom in ground state is struck by light, its electron absorbs energy ... Read More

Describe the spectra of a hydrogen atom. Use a diagrams to illustrate your answer.

05/15/2021 1

Describe the spectra of a hydrogen atom. Use a diagrams to illustrate your answer. Hydrogen produces both absorption and emission spectrum Absorption spectra It is ... Read More

What are the applications of atomic spectra?

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What are the applications of atomic spectra? Identification of elements in salts by flame test Street advertisement light fireworks Please Subscribe to promote this website. ... Read More

What is excitation of an electron?

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What is excitation of an electron? excitation of an electron occurs when an electron in a given energy level gains extra energy and jumps  energy ... Read More

What are isotopes?

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What are isotopes? Isotopes are atoms of the same element with same number of protons but different number of neutrons.   Please Subscribe to promote ... Read More

What is atomic number of an atom?

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What is atomic number of an atom? Atomic number is the number of protons in a nucleus of an atom. All atoms of the same ... Read More

Describe the structure of an atom.

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Describe the structure of an atom The atom is composed of three basic subatomic particles, namely the electron, the proton and the neutron; the characteristics ... Read More

What is an atom?

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  What is an atom? An atom is the smallest electrically neutral particle of an element that can take part in a chemical reaction. Please ... Read More

What is an element in chemistry

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What is an element? This is a substance that cannot be split into simpler substances. It is composed of discrete particles called atoms.   Please ... Read More

Group 3 elements- Inorganic chemistry

09/12/2020 1

  Members Elements                             symbol Boron                                    B Aluminium                          Al Gallium                                 Ga Indium                                  In Thallium                               Tl   General comment Boron is a non-metal, aluminium is ... Read More

Group 2 elements -A level inorganic chemistry

09/11/2020 11

It lists members of group 2 elements, their physical properties, uniqueness of beryllium, reaction with water, acids and sodium hydroxide; uses of group 2 metal ... Read More

Properties of Gama, beta and alpha particles

08/17/2020 8

Types of radiations There are three types of radiations given by radioactive substances. They all cause certain substances, such as zinc sulphide, to luminesce, and ... Read More

Properties of Gama particle -physical chemistry

08/17/2020 2

properties of gamma particles These uncharged rays are similar to X-rays they have high penetrating power; being able to pass through 0.1m of metal. have ... Read More

Properties of beta particles-physical properties

08/17/2020 0

Properties of beta particle negatively charged deflected toward positive electric field have medium penetrating power ionize gases they pass through Sponsored by The Science Foundation ... Read More

Properties of Alpha particles-physical chemistry

08/17/2020 0

Properties alpha particles positively charged helium ions ionize gases they pass through deflected towards negative electric field have low penetrating power Read More

Zinc and its compounds (A-level inorganic compounds)

02/27/2020 1

Zinc and its compounds Electron configuration 4s23d10 Properties  of zinc as a transition element Forms complexes, e.g. Zn(NH3)42+. ZnO is a catalyst in the formation ... Read More

Nickel and its compounds (A -level inorganic chemistry)

02/27/2020 0

Nickel and its compounds The electron configuration of nickel 4s23d8 Properties of nickel as a transition element Forms colored compounds; for instance, Ni2+ is green ... Read More

Cobalt and its compounds (A-level inorganic chemistry)

02/27/2020 0

  Cobalt and its compounds The electron configuration of cobalt 4s3d7 Properties of cobalt as a transition element Forms colored compounds; for instance, Co2+ is ... Read More

Manganese and its compounds (A-level inorganic chemistry)

02/27/2020 0

Manganese and its compounds The electron configuration of manganese 4s23d5 Properties of manganese as a transition element Forms colored compounds; for instance, Mn7+ is purple ... Read More

Properties of transition elements (A-level inorganic chemistry)

02/26/2020 0

Transition elements, general properties Definition Transition elements are elements with partially filled d-orbital Members Elements Atomic number Electronic configuration Sc Ti V Cr Mn Fe ... Read More

Group 7: Fluorine, chlorine, bromine, iodine (A-level inorganic chemistry)

02/26/2020 2

Group 7: Fluorine, chlorine, bromine, iodine Members Elements                     Symbols Fluorine                       F Chlorine                      Cl Bromine                      Br Iodine                          I General comment The halogens are one ... Read More

Group 4 element (carbon, silicon, germanium, tin, and lead) (A-level inorganic chemistry)

02/26/2020 7

Group 4 Elements, carbon, silicon, germanium, tin and lead Members Elements                     symbol Carbon                        C Silicon                          Si Germanium                Ge Tin                               Sn Lead                            Pb Physical properties ... Read More

Group 3 elements (boron and aluminium) (A-level inorganic chemistry)

02/25/2020 2

Group 3 elements Members Elements                             symbol Boron                                    B Aluminium                          Al Gallium                                 Ga Indium                                  In Thallium                               Tl Boron Boron is a nonmetal, aluminium is  ... Read More

Structures of solids (A-level inorganic chemistry)

02/24/2020 1

Structures of solids Solids have properties that are extremely different from those of gases, e.g., solids are incompressible and have definite shapes.  These properties result ... Read More

Chemistry of period 3 elements (A-level inorganic chemistry)

02/24/2020 1

Chemistry of period 3 elements This chapter compares the Chemistry of the elements in period 3 of the periodic table. Each element in a period ... Read More

Period II, diagonal relationship (A-level inorganic chemistry)

02/24/2020 6

Diagonal relationship This is the similarity in chemical properties between elements in the second period with elements which are lying to their right in the ... Read More

Periodic Table (A-level Inorganic chemistry)

02/22/2020 3

The Periodic Table (PT) The periodic table is a tabular arrangement such that the columns contain elements with electronically similar atoms. The rows of the ... Read More