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Reactions (Acid reactions (Metal + Acid = Salt + Hydrogen, Acid + Alkali =…
Reactions
Acid reactions
- Metal + Acid = Salt + Hydrogen
- Acid + Alkali = Salt + water
- Acid + Base = Salt + Water + Carbon dioxide
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Ionic equation
An ionic equation is a chemical equation where the electrolytes in aqueous solution are written as dissociated ions.
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3) Cross out any ions that appear on both sides of the equation, spectator ions
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Reactivity of metals
- When metals react with other substances the metals atoms form positive (+) ions
- The reactivity of a metal is related to it's tendency to form positive ions (+)
- The more easy it forms positive ions, the more reactive the metal is
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Reversible reactions
Reversible Reactions -
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- The forward reaction is the one that goes to the right
- The backward reaction is the one that goes to the left
- The reaction mixture may contain reactants and products, and their proportions may be changed by altering the reaction conditions.
- When a system at equilibrium undergoes a change in pressure, the equilibrium of the system will shift to offset the change and establish a new equilibrium. The system can shift in one of two ways: Toward the reactants (i.e. in favor of the reverse reaction) Toward the products (i.e. in favor of the forward reaction)
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Displacement reactions
What are they?
Displacement reactions involve a metal and a compound of a different metal. In a displacement reaction:
- A more reactive metal will displace a less reactive metal from its compounds
- Displacement reactions are easily seen when a salt of the less reactive metal is in the solution. During the reaction:
- The more reactive metal gradually disappears as it forms a solution
- The less reactive metal coats the surface of the more reactive metal