Question

In the experiment, 40 mL of 3 M sodium hydroxide is used to extract the benzoic acid. In order to recover the benzoic acid from the aqueous solution, 6 M hydrochloric acid is used. Calculate approximately how much 6 M hydrochloric acid will be needed to precipitate the benzoic acid. View keyboard shortcuts 12pt Paragraph

Answer 1

20 mL OF 6 M HYDROCHLORIC ACID WILL BE NEEDED

Step-by-step explanation:

M1 V1 = M2 V2

M1 = Molarity of sodium hydroxide = 3 M

V1 = volume of sodium hydroxide = 40 mL

M2 = Molarity of hydrochloric acid = 6 M

V2 = Volume of hydrochloric acid = unknown

Rearranging the equation, we have:

V2 = M1 V1 / M2

V2 = 3 * 40 mL / 6

V2 = 120 / 6

V2 = 20 mL

To precipitate the benzoic acid by 6 M of hydrochloric acid, 20 mL volume will be needed.