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Is Hydrogen gas evolved when metals react with steam?

Answer 1

Jeremiah Adams

IF they react: yes.

In some instances, the oxide will react further to form a hydroxide, and in those cases the metal is oxidized.

#M+H_2O->MO+H_2#

Or: #2M+4H_2O->2M(OH)_2+H_2#

This is for metals having a valence of two; the coefficients for other metals will vary:

#2Na+2H_2O->2NaOH+H_2#

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Answer 2

Naomi Aronson

No, hydrogen gas is not evolved when metals react with steam.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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