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1 vote
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

User MikeJansen
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2 Answers

4 votes
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
User Aman Sadhwani
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8.9k points
2 votes

Answer: The correct answer is option 2.

Step-by-step 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}* \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* \text{Volume of the solution in Liters}}}

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

User Ryuk Lee
by
7.8k points
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