7.2 Evidence of a Chemical Reaction
7.2 Evidence of a Chemical Reaction
7.2 Evidence of a Chemical Reaction
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2KI(aq) + Pb(NO 3) 2(aq) PbI 2(s) + 2 KNO 3(aq)<br />
• The cation from one compound can now pair with the anion<br />
from the other compound to form new (and potentially<br />
insoluble) products.<br />
If the potentially insoluble products are both soluble,<br />
then no reaction occurs.<br />
If one or both <strong>of</strong> the potentially insoluble products are insoluble, a precipitation<br />
reaction occurs.
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