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Reactivity series

CAIE chemistry

QuestionAnswer
What are the general physical properties of metals? High melting and boiling points - Good conductors of heat and electricity - Malleable - Ductile
Why do metals have relatively high melting and boiling points? due to strong metallic bonding there is strong electrostatic attraction between the positive ions and the negative electrons so lots of energy is required to overcome the forces.
why are metals good conductors? Metals contain free delocalised electrons and positive metallic ions
Why are metals malleable? The positive ions / atoms are arranged in layers which are able to slide over one another.
What is produced when a metal reacts with acid? Salt and hydrogen
What type of reaction occurs when a metal reacts with an acid? Why does this reaction occur? Displacement reaction: A more reactive metal than hydrogen will displace hydrogen and combine with the ion from the acid (e.g. chloride or sulfate ion).
Write the word equation for the reaction between metals and hydrochloric acid metal+ hydrochloric acid→ metal chloride + hydrogen
What is produced when a metal reacts with oxygen? Metal oxide
What is an alloy? A mixture containing a metal and another element (metal or non-metal).
Why are alloys harder than pure metals? Atoms in pure metals are arranged in uniform rows which can slide over each other easily, making them very malleable. whereas in alloys different sizes atoms distorts the layers so the cannot slide over one another easily.
What is the order of the reactivity series and how can this order be deduced? Potassium, Sodium ,Calcium, Magnesium, (Carbon),Zinc, Iron (Hydrogen), Copper The order can be deduced by the different metals reactions with acid, water and reduction with carbon.
What is meant by the reactivity of metals? The tendency of a metal atom to lose electrons and form its positive ion.
Write a balanced chemical equation for the decomposition of calcium carbonate CaCO3 + CaO-------.>CO2
Created by: tchr.19067
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