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chemical reactions - Coggle Diagram
chemical reactions
metals
above hydrogen in reactivity series, but below carbon
reacts with only steam and acid
decompose
to form metal oxide
extracted by reduction with carbon
below hydrogen in reactivity series
reacts with
neither
cold water, steam or acid
extracted by reduction with hydrogen or carbon
unstable
to heat
above carbon in reactivity series
extracted by electrolysis
very stable
to heat
reacts with both cold water and steam
energy changes
exothermic
heating
energy
absorbed
to
break
bonds
negative enthalpy change
endothermic
cooling
energy
released
to
form
bonds
positive enthalpy change
Group I elements
alkali metal +
water
-> basic
oxide
+ hydrogen
alkali metal +
steam
-> basic
hydroxide
+ hydrogen
redox
oxidising agents
Potassium manganate (VII)
Potassium dichromate (VI)
Hydrogen peroxide
reducing agents
Sulfur dioxide
Potassium iodide