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NaCl, MgSO₄, Kl

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- SI unit for energy

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- Become or cause to become incorporated into a liquid so as to form a solution.

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- The ability of solids to dissolve

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Ionic solids are made up of cations and anions

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Ionic solids are made up of cations and anions

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- Cations: positive ions
- Anions: negative ions

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- Energy needed to react

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- Does not change during phase change
- Energy of motion

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- Energy is taken from environment
- Product has more energy than reactant

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- Changes during chemical reactions
- Energy stored in bonds
-> Bonds: the attraction between atoms

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Particles are compact

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Particles are farther apart than solids

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Particles are far apart from each other

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Mass of reactants is equal to mass of products

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A + BC -> B + AC
* Will only occur is A has higher activity series than B
-> Activity series: a ranking of reactivity

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AB + CD -> AD + CB
- Neutralization reactions:
acid + base -> salt + water
- Precipitation reaction
-> Precipitate: solid suspended from solution

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A + O₂ -> oxide + energy

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C -> A + B

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A + B -> C

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- Phase transition in which a liquid turns into gas
- Molecules speed up and spread out even more

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- Phase transition in which a solid turns into a liquid
- Molecules speed up
and spread out

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- Phase transition in which a liquid turns into a solid
- Molecules slow down and come closer together

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- Chemical composition stays the same
- Physical form affected

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- A chemical change that occurs when the reactants combine to form products