Question

If you have a sugar with a molecular weight of 433 g/mol, how many grams would you need to add to 320 mL of water to create a 142 mM solution?

Answer 1

We have to prepare 320mL of 142mM solution means 142 millimoles of sugar in one litre of solution.

As sugar molecular weight= 433 g/mol

433 g/mol x .142 mol/L = 61.48 g/L

We would need 61.48g of sugar for 1 litre,

but for 320 ml,

61.48g x 0.32L / 1L

Sugar in gm = 19.67gm

Thanking you