Are there general rules for Base + Metal Compound reactions like there are for Acids?

For example, acids have some general rules.


Acid + Metal => Salt + Hydrogen Gas

Acid + Metal Carbonate => Salt + Water + Carbon Dioxide

Acid + Metal Oxide => Salt + Water

Acid + Metal Hydroxide => Salt + Water


Are there equivalent rules for bases?

Base + Metal => ?


1 Answer 1


On the same level of generalization, the rule is "no reaction", but this rule has quite a few exceptions (probably more than the rules you quoted above).

Water-soluble bases would react with amphoteric metals to produce hydrogen and the corresponding salt: $$2\ce{Al + 2KOH + 6H2O \to 2KAl(OH)4 + 3H2}$$

  • $\begingroup$ How can a metal be 'amphoteric'? Metals undergo redox reaction instead of acid-base reactions, don't they? $\endgroup$ Commented Nov 10, 2019 at 6:26
  • $\begingroup$ Just like that. $\endgroup$ Commented Nov 10, 2019 at 11:55
  • $\begingroup$ So if I write in an examination that certain metal is amphoteric, will it be accepted by a general examiner? Or calling a metal amphoteric is something done in informal talk and should be avoided in the exams? $\endgroup$ Commented Nov 13, 2019 at 0:17
  • $\begingroup$ @Aumkaar I think it will be accepted. $\endgroup$ Commented Nov 13, 2019 at 5:12

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