Untitled - Kelly Walsh High School

Aqueous Solutions 63
Quick Tip
Mg(NO 3) 2(aq) Ca(OH) 2(aq) l Mg(OH) 2 Ca(NO 3) 2
2 HNO 3(aq) Ba(OH) 2(aq) l Ba(NO 3) 2 2 H 2O
2 H 2 NO 3
2 LiF(aq) H 2SO 4(aq) l Li 2SO 2 2 HF
2 H SO 4 2
Notice that we have distributed the coefficient to each of the ions present. In
addition, we did not separate the one remaining acid, HF, because it is a weak
acid. There is a dash below the HF to remind us not to separate this compound.
Your instructors may prefer you to ionize H 2SO 4 as H HSO 4 . You should
check with him to see how you should ionize this compound.
We will now separate all of the strong bases, and place a dash below any base
that is not strong.
Cr(OH) 3(s) 3 HClO 4(aq) l Cr(ClO 4) 3 3 H 2O
— 3 H 3 ClO 4
3 KCl(aq) (NH4) 3PO4(aq) l K3PO4 3 NH4Cl Na2CO3(aq) 2 HCl(aq) l 2 NaCl CO2 H2O 2 H 2 Cl Mg(NO3) 2(aq) Ca(OH) 2(aq) l Mg(OH) 2 Ca(NO3) 2
Ca2 2 OH —
2 HNO3(aq) Ba(OH) 2(aq) l Ba(NO3) 2 2 H2O 2 H 2 NO3 Ba2 2 OH 2 LiF(aq) H 2SO 4(aq) l Li 2SO 4 2 HF
2 H SO 4 2 —
As a reminder, we will place dashes below each of the molecular compounds
(CO 2 and H 2O) because they are nonelectrolytes, and we do not want to separate
them by mistake. You can perform this step at any time in this process.
Cr(OH) 3(s) 3 HClO 4(aq) l Cr(ClO 4) 3 3 H 2O
— 3 H 3 ClO 4 —