You used a calorimeter in the heat transfer lab. Explain how the calorimeter works, and how to calculate the heat given off or a
2 answers:
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Answer:
Approximately (rounded to three significant figures) assuming that
is in excess.
Explanation:
When and
precipitate,
(the said precipitate) and
are produced:
(verify that this equation is indeed balanced.)
Look up the relative atomic mass of and
on a modern periodic table:
:
.
:
.
Calculate the formula mass of the precipitate, :
.
Calculate the number of moles of formula units in
of this compound:
.
Notice that in the balanced equation for this reaction, the coefficients of and
are both one.
In other words, if (the other reactant) is in excess, it would take exactly
of
formula units to produce
of
formula units.
Hence, it would take of
formula units to produce
of
formula units.
Calculate the volume of the solution given that the concentration of the solution is
:
.
(The answer was rounded to three significant figures so as to match the number of significant figures in the concentration of .)
In other words, approximately of that
solution would be required.