Question

How many grams of ethanol c2h5oh are required to make a 7.1M solution using 160.0ml of water?

Answer 1

The molecular weight of ethanol is 46.07 g/mol.

7.1M solution = 7.1 moles/L = 7.1 mol/160.0 ml = 0.044 moles of ethanol

Therefore, 0.044 moles x 46.07 g/mol = 2.02 g ethanol