12201 19 The lattice enthalpy of magnesium chloride is 2493 kJ mol−1 and that of calcium chloride is 2237 kJ mol−1. (a) (i) Write an equation, including state symbols, for the lattice enthalpy of calcium chloride. [2] (ii) Explain why the lattice enthalpy of magnesium chloride is greater than that of calcium chloride. [1] (b) (i) The enthalpy of solution of magnesium chloride is −155 kJ mol−1. Complete the following enthalpy diagram for dissolving magnesium chloride. MgCI2(s) [2] 12201 [Turn over (ii) Calculate the enthalpy of hydration of magnesium ions. The enthalpy of hydration of chloride ions is −364 kJ mol−1. [2]
Get full Socratic AI guidance on this question — free in the Applaa desktop app
Appy Buddy guides you step-by-step toward the answer without giving it away. Type your attempt and get instant, mark-scheme-aware clues that teach you to think like an examiner.
Join Applaa Community
Create your own games, learn AI concepts, program interactive apps, and share with a kid-safe community approved by parents. Free forever on Windows and Mac.
Available for Windows and macOS · COPPA Compliant
Exam Specification Info
This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
While Other Kids Get an AI Head Start, Is Yours Falling Behind?
Give your child the same AI app-building, exam prep and tutoring edge — free for the first month, no credit card needed.
Join 10,000+ students building their first AI-powered apps with Applaa