Untitled - Kelly Walsh High School

Aqueous Solutions 61
Don’t Forget!
Na 2CO 3(aq) HCl(aq) l
Na and CO 3 2 with H and Cl
Mg(NO 3) 2(aq) Ca(OH) 2(aq) l
Mg 2 and NO 3 with Ca 2 and OH
HNO 3(aq) Ba(OH) 2(aq) l
H and NO 3 with Ba 2 and OH
LiF(aq) H 2SO 4(aq) l
Li and F with H and SO 4 2
Each of these compounds is treated as a combination of cations (positive ions)
and anions (negative ions). You will never have a compound of only cations or
only anions.
The number of each type of ion is not important at this stage, and we do not
care, at this point, which are soluble, strong electrolytes, or weak electrolytes.
To predict the products, we combine each cation with the anion of the other
compound. We do this combination in a manner to give an overall charge of
zero.
Cr(OH) 3(s) HClO 4(aq) l Cr(ClO 4) 3 H 2O
(Cr 3 and OH with H and ClO 4 ) l (Cr 3 and ClO4 with H and OH )
KCl(aq) (NH 4) 3PO 4(aq) l K 3PO 4 NH 4Cl
(K and Cl with NH 4 and PO4 3 ) l (K and PO4 3 with NH4 and Cl )
Na 2CO 3(aq) HCl(aq) l NaCl H 2CO 3
(Na and CO 3 2 with H and Cl ) l (Na and Cl with H and CO3 2 )
Mg(NO 3) 2(aq) Ca(OH) 2(aq) l Mg(OH) 2 Ca(NO 3) 2
(Mg 2 and NO 3 with Ca 2 and OH ) l (Mg 2 and OH with Ca 2 and NO3 )
HNO 3(aq) Ba(OH) 2(aq) l Ba(NO 3) 2 H 2O
(H and NO 3 with Ba 2 and OH ) l (Ba 2 and NO3 with H and OH )