Category: Inorganic chemistry questions
What is standard pressure and temperature (s.t.p)
standard temperature and pressure (s.t.p) Standard temperature = 273K or 00C Standard pressure = 760mmHg or 1 atmosphere or 101325 Pascal Molar volume of a ... Read More
State Charles’s law of gases
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State Boyles law
Boyles laws of gases Please Subscribe to promote this website. Subscription is free Share with a friend Your comment is valuable Thank you so much Read More
What is Gay Lussac’s law of combining volumes
Gay Lussac’s law of combining volumes States that “when gases combine together at a given temperature and pressure, the do so in volumes which bear ... Read More
State kinetic theory
Kinetic theory This is useful in accounting for the known properties of gases, liquids and solids. The ideas underlying the kinetic theory, may be summarized ... Read More
State Faraday’s Laws of electrolysis
Faraday’s Laws of electrolysis The mass of a substance liberated at an electrode is proportional to the quantity of electricity used. The quantity of electricity ... Read More
Describe application of electrolysis
Application of electrolysis Industrial preparation of gases; Cl2, H2 and O2. Extraction of metal: metals above carbon in the reactivity series are almost all extracted ... Read More
Factors that decide the ion to be eliminated or discharged first during electrolysis.
Factors that decide the ion to be eliminated or discharged first during electrolysis. Position in electro-chemical series: Series for cations (high to low) K+, Ca2+, ... Read More
Describe standard Hydrogen electrode
Standard Hydrogen electrode It consists of hydrogen gas at 298K and pressure of 1 atmospheres bubbling over a strip of platinized foil (i.e. platinum coated) ... Read More
Discuss the factors affecting standard electrode potential
Factors affecting standard electrode potential Electrode potential involves formation of hydrated ions. It is a sum of atomization energy (which is endothermic) + ionization energy ... Read More
What is meant by standard electrode potential (SEP)
Standard electrode potential (SEP) This is the electrode potential of a metal dipped in a solution containing one mole of metal ions in a dm3/litre ... Read More
Explain factors affecting the magnitude of the electrode potential difference
Factors affecting the magnitude of the electrode potential difference Concentration of metal ions already in solution. Since the ionization equation (1) is a reversible ... Read More
What is electrode potential
Electrode potential is a potential difference that is set up between a metal and its solution containing metal ions. Please Subscribe to promote this ... Read More
Factors affecting conductivity of an ion at infinite dilution
Factors affecting conductivity of an ion at infinite dilution Charge on the ion: the bigger the charge the higher the conductivity because the ion caries ... Read More
Molar conductivity at infinite dilution, Λ0
Molar conductivity at infinite dilution, Λ0 This is the conductivity of 1 mole of electrolyte when the solution is very dilute that the ions experience ... Read More
Kohrlrausch’s law of independent migration of ions.
Kohrlrausch’s law of independent migration of ions. It state: “the molar conductivity of an electrolyte at infinite dilution is the sum of molar conductivity of ... Read More
Describe variation of molar conductivity with concentration of electrolyte
Variation of molar conductivity with concentration Molar conductivity for both strong and weak electrolyte decrease as the concentration increase as shown by the graphs below ... Read More
Molar conductivity, Λc
Molar conductivity, Λc This is the conductivity of a solution that contains 1 mole of an electrolyte. Please Subscribe to promote this website. Subscription ... Read More
What is conductivity of solution?
Conductivity is reciprocal of resistivity. Or Conductivity is a reciprocal of resistance of a solution of unit volume Please Subscribe to promote this ... Read More
Resistance R of electrolytic solution
Resistance R of electrolytic solution This is the drag force experienced by ions as they migrate towards the respective electrodes. Please Subscribe to promote this ... Read More
Describe the factors that determine the rate of chemical reaction
Factors that affect the rate of reaction The main factor which influence reaction rate are (i) concentration of the reactant (ii) temperature (iii) Pressure (iv) ... Read More
What is activated complex in chemistry?
An activated complex is the structure that results in the maximum energy point along the reaction path. or An activated complex is a species with the maximum energy in ... Read More
What is half life
Half-life of the first order reactions Half-life of the reaction is the time taken by a reactant to reduce to half of its initial concentration. ... Read More
What is meant by molecularity of a reaction?
Molecularity of a reaction is the number of species that take part in the rate determining step. Please Subscribe to promote this website. Subscription ... Read More
What is meant by order of reaction
The order of reaction is the sum of exponents to the reactants in a rate law. Please Subscribe to promote this website. Subscription is ... Read More
Stoichiometry of a reaction
Stoichiometry of a reaction is the quantitative relationships of the amount of products and reactants in a given reaction Please Subscribe to promote this website. ... Read More
What is a rate constant?
The rate constant, K, of the reaction is a proportionality factor in the rate law of chemical kinetics that relates the molar concentration of reactants to reaction rate. ... Read More
what is a rate of reaction
A rate of reaction is the amount of the reactant(s) converted into a product per unit time. or A rate of reaction is the amount ... Read More
Factors affecting equilibriums and equilibrium constants
Factors affecting equilibriums these are Temperature Pressure Catalyst Concentration The effect of the above factors on equilibrium position for the equilibrium mixture can be explained ... Read More
Characteristics of equilibrium of a reversible reaction
Characteristics of equilibrium of a reversible reaction Occurs at constant temperature Occurs in closed system It is dynamic equilibrium Please Subscribe to promote this website. ... Read More
Characteristics of transition elements
Characteristics of transition elements form colored ions form complex ions form colored compounds have variable oxidation states have catalytic properties form interstitial compounds Please ... Read More
Structure of sodium chloride
The sodium chloride structure The x-ray analysis of crystal structures show that sodium chloride consists of a regular three-dimensional assembly of Na+ and Cl- ions. ... Read More
How to distinguish zinc and aluminium ions
Distinguishing Zn2+ from Al3+ Zn2+ forms a white precipitate with potassium hexacyanoferrate II whereas Al3+ does not. Al3+ gives of effervescence with sodium carbonate solution ... Read More
Reaction of zinc with Sulpuric acid:
Reaction of zinc with Sulpuric acid: Dilute sulphuric acid reacts with zinc evolving hydrogen. Zn(s) + (dil.) H2SO4 →ZnSO4(aq) + H2(g) Hot and concentrated sulphuric ... Read More
Properties of zinc as transition element
Properties of zinc as a transition element Forms complexes, e.g. Zn(NH3)42+. ZnO is a catalyst in formation of methanol from carbon monoxide and hydrogen. Please ... Read More
Explain why zinc in not considered a typical transition element.
Reasons why zinc is not a typical transition element has a full d-orbital forms white compounds Please Subscribe to promote this website. Subscription is ... Read More
Explain why the solution of zinc chloride has a pH less than 7
Zinc ions hydrolyze in aqueous solution to form hydrogen ions Zn2+(aq) + 2H2O(l) → Zn(OH)2(s) + 2H+(aq) Production of hydrogen ions lowers pH Please Subscribe ... Read More
Explain how zinc protects iron from rusting
Zinc protects iron from rusting in the following ways zinc oxide forms a protective barrier that prevents oxygen and water from reaching the metal zinc ... Read More
Explain the variations of melting points of elements of period 3
Table 2.15 The melting points of elements of the third period of the periodic table Elements Na Mg Al Si P S Cl Configuration ... Read More
What is Electron affinity?
Electron affinity is energy change required to add an electron to gaseous atom or anion to form gaseous anion. First electron affinity is energy change ... Read More
What is first ionization energy?
First ionization energy is the minimum energy required to remove an electron from gaseous atom to form gaseous ion with single positive charge. Note that ... Read More
Describe variation of first ionization energy across a period
Variation of first ionization energy across period II and period III From lithium to neon there is a pronounced increase in ionizations energies with slight ... Read More
What is ionization energy?
Ionization energy is the minimum amount of energy required to remove an electron from gaseous atom or ion to form gaseous ion. Note that first ... Read More
Explain the variation of atomic radii in the first series of transition elements
Variation of atomic radii in transition elements The atomic radii of elements of a particular series decrease gradually up to the midway element (from Sc ... Read More
State and explain the variations of atomic radius
Atonic radii decrease across a period due to increase in effective nuclear charge the attracts the outer electrons towards the nucleus. Atomic radii increase down ... Read More
What is atomic radius?
Atomic radius is the distance between the center of the nucleus and the farthest electron under the influence of the nucleus of an atom. Please ... Read More
What is metallic character?
Metallic characters is the ease by which an element loses valency electrons Metallic characters decreases across a period due to increase in effective nuclear charge ... Read More
Explain the variation of electropositivity across a period and down the group
Variation of electronegativity across a period it decreases due to increase in effective nuclear attraction on outer electrons Variation of electropositivity down the group Electropositivity ... Read More
What is electropositivity?
Electropositivity is the measure of the ease of an atom of an element to lose valence electrons Please Subscribe to promote this website. Subscription is ... Read More
State and explain the factors that affect electronegativity.
Factors that effect electronegativity. i) atomic radius, The bigger the size of an atom, the lower the attraction of the nucleus to the ... Read More
Explain the variation of electronegativity across the period and down the group
Variation of electronegativity across the period Electronegativity increases across a particular period from alkali metal to halogen Reason Across the period an additional electron is ... Read More
What is electronegativity?
Electronegativity is the relative tendency of an atom to attract bonding electrons in a covalent bond of dissimilar atoms Note "relative" because electronegativity is states ... Read More
Equation for the reaction of phosphorus with sodium hydroxide
Reaction of phosphorus with sodium hydroxide Phosphorus reacts with hot concentrated NaOH to produce phosphine P4 (s) + 3OH- (aq) + 3H2O (l) → PH3 ... Read More
Qualitative analysis f nickel II ions
Qualitative analysis f nickel II ions Common nickel II salts Nickel (II) sulphate, NiSO4.7H2O Nickel (II) carbonate, NiCO3 (NH4)2SO4.NiSO4.6H2O Addition of dilute sodium hydroxide ... Read More
Properties of nickel as a transition element
Properties of nickel as a transition element Forms colored compounds; for instance Ni2+ is green Has variable oxidation states; +2, +3, Forms complexes, e.g. Ni(NH3)62+. ... Read More
Qualitative analysis of Manganese II ions
Qualitative analysis of Manganese II ions Addition of dilute sodium hydroxide of ammonia solution drop wise until in excess. A white ppt. insoluble in excess, ... Read More
Equation for disproportionation of manganese VI
Equation for disproportionation of manganese VI 3MnO42- (aq) + 2H2O (l) → 2MnO4- (aq) + MnO2 (s) + 4OH- (aq) Please Subscribe to promote this ... Read More
What is meant by disproportionation reaction
Disproportionation reaction is a reaction where there is concurrent oxidation and reduction Please Subscribe to promote this website. Subscription is free Share with a ... Read More
Disadvantages of using potassium permanganate (VII) in volumetric analysis
Disadvantages of using potassium permanganate (VII) in volumetric analysis Manganate (VII) cannot be used as a primary standard because it cannot be obtained in pure ... Read More
Variation of oxidizing power of manganate (VII) ions with pH.
Variation of oxidizing power of manganate (VII) ions with pH. The oxidizing power of potassium permanganate depends on the pH as shown below: (a) Acidic ... Read More