Respuesta :

savagechlo

Answer:

a mole of lactic acid = 90 g

a 0.5 M solution would require 1/2 mol or 45 g

Explanation:

The molecular mass is 90 d, the combined atomic masses of its atoms.

samueladesida43

There are 45 grams of lactic acid in 1 liter of a 0.5M solution of lactic acid

CALCULATE THE NUMBER OF MOLES IN THE SOLUTION:

  • The number of moles of lactic acid (C3H6O3) in the solution can be calculated by multiplying the molarity (M) of the solution by its volume (L). That is;

no. of moles = molarity × volume

  • According to this question, the 1L lactic acid solution has a molarity of 0.5M, hence, the number of moles is calculated as follows:

no. of moles = 1 × 0.5

no. of moles = 0.5moles of lactic acid

CALCULATE THE MASS OF LACTIC ACID:

  • The mass in grams of lactic acid can be calculated by multiplying the molecular mass of lactic acid (C3H6O3) by its number of moles i.e.

Mass = no. of moles × molar mass

Molar mass of (C3H6O3) = 12(3) + 1(6) + 16(3)

= 36 + 6 + 48

= 90g/mol

Mass of lactic acid = 0.5 mol × 90 g/mol

Mass of lactic acid = 45grams.

Hence, there are 45 grams of lactic acid in 1 liter of a 0.5M solution of lactic acid.

Learn more: https://brainly.com/question/5891056

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