apa distilata = subst. pura
argint = subst. pura
saramura = amestec
aer = amestec (oxigen si azot)
apa de var = amestec
clorura de calciu = subst. pura
fonta = amestec
tinctura de iod = amestec
otet = amestec
acid azotic = subst. pura
cupru = subst. pura