Question

Chemistry

Posted 5 months ago

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A lab group prepares a $0.50 \mathrm{~L}$ solution of $0.35 \mathrm{M} \mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}$. They accidentally leave the solution uncovered overnight and return to find its volume decreased to $0.47 \mathrm{~L}$.
What is the new molarity of the $\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}$ solution?
Report your answer to two decimal places.
$\square$ $\mathrm{M} \mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}$
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Answer from Sia

Posted 5 months ago

Solution

1

2

3

Answer

0.37 M

Key Concept

Molarity is the number of moles of solute per liter of solution.

Explanation

The molarity of a solution changes when the volume of the solution changes, provided the amount of solute remains constant. By calculating the initial moles of solute and dividing by the new volume, we determine the new molarity.

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