What is the concentration of sugar (C12H22O11) in mol L-1 if its 20 g

1.	What is the concentration of sugar (C12H22O11) in mol L-1 if its 20 g are dissolved in enough water to make a final volume upto 2 L?
Answer» Molarity = {Mass of the solute}/{Molar mass of the solute x Volume of the solution in litres} Molar mass of sugar (C₁₂H₂₂O₁₁) = 12 x 12 + 22 x 1 + 11 x 16 = 144 + 22 + 175 = 342 u Molarity = {20 g}/{342 x 2L} = 0.03 mole/litre

What is the concentration of sugar (C12H22O11) in mol L-1 if its 20 g are dissolved in enough water to make a final volume upto 2 L?

Answer»

Molarity

= {Mass of the solute}/{Molar mass of the solute x Volume of the solution in litres}

Molar mass of sugar (C₁₂H₂₂O₁₁) = 12 x 12 + 22 x 1 + 11 x 16

= 144 + 22 + 175 = 342 u

Molarity = {20 g}/{342 x 2L} = 0.03 mole/litre