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WARRIOR [948]
3 years ago
15

What is the molarity of a solution if 5 moles of solute are dissolved in 8 L of solvent.

Chemistry
1 answer:
tankabanditka [31]3 years ago
6 0

Answer:

0.625mol/L

Explanation:

Given parameters:

Number of moles of solute = 5moles

Volume of solvent = 8L

Unknown:

Molarity = ?

Solution:

Molarity is the number of moles of solute per unit volume of solution. It is mathematically expressed as

  Molarity  = \frac{number of moles }{Volume}  

  Molarity  = \frac{5}{8}   = 0.625mol/L

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Molarity = moles of solute/volume of solution in liters.

The solute here is NaCl, of which we have 46.5 g. To calculate the molarity of an NaCl solution, we need to know the number of moles of NaCl. To convert from grams to moles, we divide the mass by the molar mass of NaCl. The molar mass of NaCl is the sum of the atomic masses of Na and Cl: 23 amu + 35 amu = 58 amu. For our purposes, we can regard amu as equivalent to grams/mole.

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