What acid can dissolve iron but not gold and platinum?

Question

What acid can dissolve iron but not gold and platinum?

Answer 1

sulphuric acid,nitric acid ,hydrochloric acid

Answer 2

H2SO4 > sulphuric acid.

HCl > hydrocloride acid.

All strong acids can dissolve reactive metal.

Thank you.

Answer 3

Most strong acids, such as hydrochloric, nitric or sulphuric acid will do the trick.

Only regia aquia, or royal water will dissolve gold and platinum.  This is a mixture of concentrated nitric and hydrochloric acids.

Answer 4

Strong acid (HCl, H2SO4, HNO3) can dissolve does

Weak one, like HI, doesn't work so well (I have never had a chance to tried, so this is just a guess)

Don't know if HClO, HClO3, and other similar one will ever do

In addition, most of acid can't dissolve Au and Pt alone (I knew that a 1:3 or 3:1 solution of HCl and HNO3 does)