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Molarity

What is the c...

Question

What is the concentration of sugar in mol/L if its 20g are dissolved in enough water to make a final volume upto 2L

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Solution

Mass of sugar = 20 g
Molecular mass of sugar ( C₆H₆O₁₂) = 342 g
Amount of water =2 L= 2000 mL
Number of moles of sugar = $\frac{20}{342} = 0.058 m o l e s$

concentration in terms of molarity= $n u m b e r o f m o l e s \times \frac{1000}{2000} = 0.029 M$

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