Question

5.85 g of nacl is dissolved in 200 ml of water. What will be the molarity of this solution

Answer 1

hi there

You want to first figure out how many moles of NaCl you have. Since the molar mass of NaCl is approximately 58.5 grams/mole, you have about .1 mole of NaCl.

Molarity is calculated as the moles of solute per liters of solution. Your moles of solute is .1, since your volume of solvent is 200 mL, you have .2 liters.

.1/.2 would be .5 M.

So you have a .5 M solution. Almost.

Technically speaking, you have .1 mole and .2 liter of solvent. That means that your solution will probably have a volume of a bit more than .2 liter, meaning your molarity will be a little bit less than .5.

For all intents and purposes though, it’s .5.

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Answer 2

hope it helps you.