Chemistry Paper 1 Revision || Success Path || KCSE 2026

Complete step-by-step walkthrough and marking scheme for Chemistry Paper 1 (233/1 Theory) Success Path Pre-Mock / KCSE 2026 Prediction (Part 1: Questions 1 to 18). We break down cation qualitative analysis, hydrogen gas preparation (combustion tube & suck-back trap), solubility calculations, Graham's law, thermochemistry (Delta T), empirical formula, and Gay-Lussac's law. TIMESTAMPS: 00:00 - Paper Overview 00:16 - Q1: Cation Tests 01:22 - Q2: Uses & Effects of CFCs 02:32 - Q3: Giant Ionic vs Molecular Oxides 03:42 - Q4: Solubility Calculations 04:48 - Q5: Hydrogen Gas & Suck-Back Trap 06:18 - Q6: Graham's Law of Diffusion 07:08 - Q7: Thermochemistry ($\Delta T$) 10:08 - Q8: Oxygen in Air (Iron Filings) 10:53 - Q9: HCl Gas Preparation 12:12 - Q10: Empirical & Molecular Formula 15:43 - Q11: Structure & Bonding 18:44 - Q13: Bond Energies & Heat of Reaction 21:52 - Q15: Rates of Reaction 25:42 - Q18: Gay-Lussac's Law & Wrap-Up GET FULL REVISION GUIDES & ESSAYS HERE 👇 👉 https://selar.com/8282q8221e 🎁 FREE SAMPLE REVISION NOTES ON WHATSAPP: 👉 WhatsApp: 0728354355 (https://wa.link/j1w3u0) 📲 JOIN OUR LIVE ONLINE CLASSES: Weekly KCSE Revision Masterclasses on Google Meet | Call / WhatsApp: 0728354355 🔔 Subscribe for Part 2 and complete national school mock predictions! #KCSE #KCSEChemistry #ChemistryPaper1 #KCSE2026 #SuccessPathMock #MarkingScheme