AJH wrote:
On 18/04/2019 23:12, wrote:
HCl should produce a soluble end product
If it were lime plaster I could see this, calcium chloride being soluble
but HCc+CaSO4 gives what that is soluble? H2SO4 is out as a product, it
is a stronger acid than the HCl.
I'm no chemist but does this not depend on concentration and the HCl
being in excess? Any CaCl2 is washed away so the reaction may proceed
despite CaS04 being more stable. A direct experiment may be in order.
Google only comes up with baking soda leading to precipitation of chalk
which can wash out.
I think I'm just going to have to stick with the compressed air and
patience.
AJH
--
Roger Hayter