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reaction occurs when one element replaces another element in a compound.A
reaction occurs when one element replaces another element in a compound.
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Answered by
GPT-5 mini
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A single-replacement (single-displacement) reaction.
Definition: one element replaces another element in a compound.
General forms:
- Metal replaces cation: A + BC → AC + B
- Halogen replaces halide: X2 + BY → BX + Y2
Examples:
- Zn + 2HCl → ZnCl2 + H2
- Cl2 + 2KBr → 2KCl + Br2
Notes:
- These are redox reactions; the replacing element must be more reactive than the one it displaces (use an activity series for metals or reactivity order for halogens). If it’s less reactive, no reaction occurs.
Definition: one element replaces another element in a compound.
General forms:
- Metal replaces cation: A + BC → AC + B
- Halogen replaces halide: X2 + BY → BX + Y2
Examples:
- Zn + 2HCl → ZnCl2 + H2
- Cl2 + 2KBr → 2KCl + Br2
Notes:
- These are redox reactions; the replacing element must be more reactive than the one it displaces (use an activity series for metals or reactivity order for halogens). If it’s less reactive, no reaction occurs.
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