s,l and aq

s is solid,like S,C,Mg,Ag,Fe,Pb,Na,Ca,Mn,K........

l is liquid ,example like H2O,O2,H2,F2,CO2,N2

aq is aqueous solution,example like HCL,AgSo4,CACO3,AgNO3

s :solid
usually higher in concentration then l (anhydrous)

l :liquid
usually higher in concentration then aq (H2SO4(l) can release white fumes). Highly corrosive and acidic

aq : aqeous solution
Diluted with large amount of water

2014-04-05 08:32:03 補充：
aqueous

there are some chemical equation

s= Soild （Ag Ca Mg ....）

l=liquid （H2O）

aq=aqueous solution （HCl H2SO4....)

g= gas ( O2 CO2)

some example there::
1. 2 AgO(s)------->2Ag(s)+O2(g)
2. 2ZnO(s)+2C(s)------>2Zn(s)+CO2(g)

Those are symbols used in chemical equations.

s means solid
l means liquid
aq means aqueous solution

and g means gas.

like :

CaCO₃(s) + 2HCl(l) → CaCl₂(aq) + H₂O(l) + CO₂(g)


2014-03-30 12:12:27 補充：
Sorry, It should be :

CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + H₂O(l) + CO₂(g)