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HKDSE 2025 最新課程
Integrated Science 補習
朗林化學精選概念與題目分享
HKDSE 科學補習 × Integrated Science × Chemistry 核心概念
朗林化學（Long Lam Chemistry）為香港專科 HKDSE 化學補習社，專注 Integrated Science 及 Chemistry 補習。課程緊貼最新 DSE 考試趨勢，幫助學生掌握 Periodic Table、Chemical Bonding、Electrochemistry 等核心概念。
我們提供太子、藍田、沙田、荃灣四大地區實體小班教學，以及 Zoom 線上課堂，讓學生輕鬆掌握 Integrated Science 的跨學科知識。
精選 Integrated Science 題目與詳解
Which element has the highest electronegativity? Explain using Periodic Trends.
Fluorine (F) 擁有最高 electronegativity（4.0）。根據 Periodic Trends，electronegativity 由左至右遞增、由上至下遞減，因原子半徑減小，核吸引力增強。
Compare the melting points of NaCl and MgO using Ionic Bonding strength.
MgO 熔點較高。因 Mg²⁺ 及 O²⁻ 電荷較高，Ionic Lattice Energy 較強（Lattice Energy ∝ q₁q₂ / r）。故 MgO 比 NaCl 更穩定。
Calculate the E°cell for the reaction: Zn + Cu²⁺ → Zn²⁺ + Cu
E°cell = E°cathode − E°anode = +0.34 V − (−0.76 V) = +1.10 V。反應為自發（spontaneous），E°cell > 0。
What is the pH of 0.01 M HCl solution?
HCl 為強酸，[H⁺] = 0.01 M = 10⁻² M。因此 pH = −log(0.01) = 2。
Name the functional group in CH₃COOCH₂CH₃ and state its use.
官能基為 Ester（酯基）。酯常用作香料及溶劑，例如乙酸乙酯有水果香味。
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English Version
Long Lam Chemistry is a specialist HKDSE Chemistry tutoring centre in Hong Kong, focusing on Integrated Science and Chemistry. Our lessons cover key concepts including Periodic Trends, Ionic Bonding, Electrochemistry and Organic Chemistry with detailed exam-style questions and solutions.
We offer small-group classes in Prince Edward, Lam Tin, Sha Tin and Tsuen Wan, as well as online Zoom lessons.
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