Definitely chemical. I can tell because when I do it, it lets off a sulfur smell, indicating that hydrogen sulfide has been released. I've run the same test with other acids and come up with similar results, only the residue left behind after evaporation is different. The hydrogen must be bonding with the sulfur inside the chalk and creating that strong smell (more noticeable if you use a odorless acid). Did you know that pure elemental sulfur is odorless? The true chemical you smell is hydrogen sulfide, not plain sulfur.
A chemical change, because the hydronium ions transfer their protons to the carbonate. thereby the protoned carbonate molecules fall apart in a molecule of water and a molecule of carbon dioxide
It would be a physical change. Anytime you have a "mix" it will be physical because chemicals need to be compounded to form a chemical change.
This is a physical change.
This is a physical change.
physical :)
physical
No, it is physical
Mixing salt and pepper is a physical change
It is a Physical change
Actually both physical and chemical changes are happening during cement mixing.
Physical change as no new substance is formed and the properties have also not changed. Hope it helps!
physical change
Physical
No, it is physical
Mixing salt and pepper is a physical change
Physical
It depends on what you are mixing it with.
it is a chemical change
physical :)
It is a Physical change
both chemical and physical
A simple mixing is a physical process.
A simple mixing is a physical process.