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Josh prepares a solution by mixing sodium nitrate and water. To calculate the molarity of the solution, Josh should calculate the moles of which substance, and why?

1 sodium nitrate, because it is the solvent

2 sodium nitrate, because it is the solute

3 water, because it is the solvent

4 water, because it is the solute

Verified Answer :

DavidOrrell

Sodium nitrate because it is the solute. If Josh knows how many moles of NaNO3 he dissolves and the volume of water (solvent) he dissolved it in, concentration = moles / volume

Answer: The correct answer is option 2.

Explanation:

\(\text{moles of compound}=\frac{\text{Mass of the compound}}{\text{Molar mass of the compound}}\)

\(Molarity=\frac{\text{Mass of the solute}}{\text{Molar mass of the solute}\times \text{Volume of the solution in Liters}}}\)

Josh prepares a solution by mixing sodium nitrate and water that is sodium nitrate is a compound which is dissolved in water(solvent) as solute.

Solution : Sodium Nitrate + water

\(Molarity=\frac{\text{Mass of the}NaNO_3}{\text{Molar mass of the}NaNO_3\times \text{Volume of the solution in Liters}}}\)

Josh should calculate the moles of sodium nitrate, because it is the solute.

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