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Question
Jan Villaroel
 Topic: Chemistry Posted 5 months ago
What is the mass of sodium chloride used to create a 250 mL solution at a concentration of 3.5 M?

What is the mass of sodium chloride used to create a 250 mL solution at a concentration of 3.5 M?


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Koala Tutor
Jul 13, 2024
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To find the mass of sodium chloride (NaCl) needed, we first need to understand that the concentration (M) is defined as moles of solute per liter of solution.

So, a 3.5 M solution means there are 3.5 moles of NaCl in 1 liter (or 1000 mL) of solution.

Since we want to make a 250 mL solution, we need to find out how many moles of NaCl are needed for this volume.

(250 mL / 1000 mL) * 3.5 moles = 0.875 moles of NaCl

The molar mass of NaCl is approximately 58.44 g/mole.

So, the mass of NaCl needed is:

0.875 moles * 58.44 g/mole = 51.135 g

So, we need approximately 51.135 grams of NaCl to make a 250 mL solution at a concentration of 3.5 M.

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