Metals with Water and Acids Flashcards

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What is the general word equation for the reaction of a reactive metal with cold water?

Metal + water → metal hydroxide + hydrogen.

You may see fizzing (bubbles of gas) and the metal getting smaller or disappearing. The water may also get warmer.

Metal + steam → metal oxide + hydrogen.

They are less reactive, so they react very slowly or not at all with cold water, but steam is hotter and gives enough energy for the reaction.

Metal + acid → salt + hydrogen.

Hydrogen is made. You test it with a lit splint; it burns with a squeaky pop.

Magnesium chloride and hydrogen are formed.

Zinc sulfate and hydrogen are formed.

A metal higher in the reactivity series reacts faster and more strongly. A metal lower down reacts slowly or may not react at all.

No. They are less reactive than hydrogen, so they cannot push hydrogen out of the acid to form hydrogen gas.