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defon
3 years ago
5

When a colorless aqueous solution of lead nitrate is combined with a colorless aqueous solution of sodium iodide a bright yellow

precipitate is formed. what is the chemical formula for the precipitate?
Chemistry
1 answer:
Leya [2.2K]3 years ago
7 0
Pb(NO₃)₂(aq) + 2NaI(aq) → 2NaNO₃(aq) + PbI₂(s)

PbI₂ (the precipitate)
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The equilibrium constant for the gas-phase isomerization of borneol (c10h17oh) to isoborneol at 503 k is 0.106. a mixture consis
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The solution is as follows:

K = [Partial pressure of isoborneol]/[Partial pressure of borneol] = 0.106

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Use the ICE approach

        borneol  →  isoborneol
I         0.0972           0.0486
C         -x                     +x
E     0.0972 - x        0.0486 + x

Total moles = 0.1458

Using Raoult's Law,
Partial Pressure = Mole fraction*Total Pressure
[Partial pressure of isoborneol] = [(0.0972-x)/0.1458]*P
[Partial pressure of borneol] = [(0.0486+x/0.1458)]*P

0.106 = [(0.0972-x)/0.1458]*P/ [(0.0486+x/0.1458)]*P
Solving for x,
x = 0.0832 

Thus,
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<em>Mol fraction of isoborneol = (0.0972-0.0832)/0.1458 = 0.096</em>
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