Untitled - Kelly Walsh High School

60 CHEMISTRY FOR THE UTTERLY CONFUSED
Don’t Forget!
Quick Tip
with any solution containing the sulfate ion to form insoluble lead(II) sulfate. If
the net ionic equation form is used, we don’t need to know the spectator ions
involved. In most cases, this is not a problem.
In writing ionic and net ionic equations, don’t break apart covalently bonded
compounds unless they are strong acids that are ionizing.
Let’s review with some more examples. We will treat these together to give
additional practice on each step before moving on to the next step. These multiple
examples allow you to practice each step before moving on to the next
one. We will begin with reactants:
Cr(OH) 3(s) HClO 4(aq) l
KCl(aq) (NH 4) 3PO 4(aq) l
Na 2CO 3(aq) HCl(aq) l
Mg(NO 3) 2(aq) Ca(OH) 2(aq) l
HNO 3(aq) Ba(OH) 2(aq) l
LiF(aq) H 2SO 4(aq) l
If the phases (s, l, g, aq) are not present, you may wish to add these terms, if possible,
because they are useful reminders.
We will begin by predicting the products. To predict the products, we need to
know what ions are available. This will require an examination of each compound
to determine what ions are present. We will write this information below
each of the equations:
Cr(OH) 3(s) HClO4(aq) l
Cr3 and OH with H and ClO4 KCl(aq) (NH4) 3PO4(aq) l
K and Cl 3
with NH4 and PO4