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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
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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