WASSCE 2025 CHEMISTRY TRIALS QUESTIONS 👇👇👇👇👇 https://whatsapp.com/channel/0029VaEW2JPEawdvPSdOBG1m Question a) Give the IUPAC names of each of the following substances. i) SO32- . ii) CuSO4.5H2O. iii) KMnO4. b) Define each of the following terms: i) standard solution. ii) saturated solution. iii) standard enthalpy of formation. c) A 250cm3 solution of K2Cr2O7 with concentration 0.025m0l dm-3 is to be prepared from a stock solution with concentration 0.04mol dm-3. Calculate the volume of the stock solution required. https://whatsapp.com/channel/0029VaEW2JPEawdvPSdOBG1m d) Account for the following observations: i) The enthalpy of neutralization between strong acids and strong bases is constant but that between weak acids and weak base varies and it also low. ii) Washing down the acid or base splashed on the walls of a conical flask with a little distilled water during volumetric analysis does not have any effect on the titre values. *CHEMISTRY PREDICTED TOPICS* *Electronic Configuration (Pauli's Exclusion principle ) *Ionisation Energy & Chemical Bonding (ionic) https://whatsapp.com/channel/0029VaEW2JPEawdvPSdOBG1m *Hybridization *Mole concept and Calculations *Laws of Chemical Combination *Limiting Reagent and Reaction in Excess *Empirical and Molecular Formula *Hazards Associated with Nuclear Reaction *Calculations in Radioactivity Decay *diamond and Graphite bonds & allotropy * Calculations involving the ideal gas equation * Standard energy enthalpy, lattice energy ,enthalpy of combustion and Calculations involving *Systematic names of Compounds *Examples of elements which are metals and e.g of elements which are liquids *Rate of Reaction (factors influence rate of Chemical Reaction, their effects , e.g of catalysts, Calculations , rate constant) *Chemical Equilibrium (Equilibrium constant , Calculations, le chatelier's principle and Equilibrium disturbance and applications of le chatelier's principle ) *Acids and bases( Calculation of pH and pOH, buffer solution and its applications) 0542743763_Dr. *solubility ( Calculations) *Redox Reactions (Spectator ions , balancing oxidation-reduction equations, factors that affect electrode potentials, prediction of spontaneous Reaction,electrolysis and applications, primary and secondary cells and electrochemical cell ) *Organic Chemistry *Chemical Industry and Extraction of Metals _CONFIRMED TOPICS WILL BE AVAILABLE BY THE END OF MAY_