There are many different kinds of metal. There are highly reactive metals such as sodium, which if placed in water will react immediately, forming a sodium hydroxide solution and releasing hydrogen gas. There are moderately reactive metals such as iron, which if placed in water will slowly start to rust. And there are non-reactive (or inert) metals such as gold, which if placed in water don't do anything.
Metal + Water (H2O) produces → Metal Hydroxide (OH-) and Hydrogen gas (H2).
metal oxides
I think you mean metal + water = metal hydroxide + hydrogen. This is a displacement reaction. It can also be called a redox reaction.
It is a decomposition reaction
If the metal's temperature has equilibriated with the water, than the temperature of the system (water and metal) will be the same.
Non metal.
I dont think there is a metal stored under water because they react with water and instead are stored in kerosene or oil. Water often corrodes the metal producing rust so i cant think of any metal that would be stored under water.
Metal oxide + Water --> Metal hydroxide
A water plus a metal makes a metal hydroxide and hydrogen gas For example, Potassium + Water ---> Potassium Hyroxide + Water 2K + 2H20 ---> 2KOH + H2
well, not metal+metal, but for the other 2 you'd have to specify, because water+metal=good conductivity & just water or another liquid = good conductivity. now stone, it is a horrible conductor.
acid + metal carbonate--> Salt+ Carbon dioxide+ water
Metal Hydroxide + Acid = Metal Salt + Water
single replacment reaction
synthesis
You get the metal hydroxide instead of the metal oxide. This happens with extremely reactive metals such as sodium. 2Na + 2H2O --> 2NaOH +H2
I think you mean metal + water = metal hydroxide + hydrogen. This is a displacement reaction. It can also be called a redox reaction.
Acid plus Base gives a Salt and Water. Acid plus Metal gives Hydrogen gas and a Salt.
An alloy?
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