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12-05-2017
Chemistry

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Three teaspoons of sucrose(17.1 g) is dissolved in hot water to make a total volume of 250 ml solution. Calculate the molarity

please help me by showing work

very confused on what to do

Respuesta :

Willchemistry Willchemistry

12-05-2017

Molar mass sucrose :

C12H22O11 = 342.29 g/mol

number of moles of the solute :

n = mass solute / molar mass

n = 17.1 / 342.29

n = 0.05 moles

Volume in liters :

250 mL / 1000 = 0.25 L

therefore :

Molarity = moles of solute / volume

Molarity = 0.05 / 0.25 => 0.2 mol/L

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