Question

Be sure to answer all parts. How many milliliters of a 0.24 M sucrose solution contain each of the following number of grams? The molar mass of sucrose (C12H22011) is 342.3 g/mol. a. 1.16 g ml b. 24.0 mg

Answer 1

Molarity of a solution is given as,

Molarity = moles/volume in liters

Number of moles = mass/molar mass

a. 1.16 g

Number of moles = 1.16/342.3

= 0.00339 moles

Volume = 0.24 M × 0.00339 mol

= 0.0008136 L

1 L = 1000 ml

Volume = 0.814 ml

b. 24 mg

1 mg = 0.001 g

24 mg = 0.024 g

Number of moles = 0.024/342.3

= 7.01 × 10^-5 mol

Volume = 7.01 × 10^-5 × 0.24

= 0.017 ml