The diagram below shows the temperature dropping from 80°C to 20°C.
2 answers:
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Explanation:
Total volume of the solution will be (10 ml + 10 ml) = 20 ml. As there are 1000 ml in 1 L. So, 20 ml will be equal to 0.02 L.
As molarity equals number of moles divided by volume in liter. Hence, calculate number of moles of as follows.
No. of moles =
=
= mol
Hence, moles of will also be equal to
mol.
Now, calculate the no. of moles of as follows.
No. of moles =
=
= mol
As there are 2 ions in 1 mole of
. Hence, in
mol number of
ions will be
mol.
When both the solutions are mixed together then molarity of the solution will be calculated as follows.
Molarity of solution =
=
= 0.015 M
Thus, we can conclude that the molar concentration of Na (aq) in the given solution is 0.015 M.