1. A student needs to prepare a solution that is 5:1 of acid to base. The acid c

Question

1. A student needs to prepare a solution that is 5:1 of acid to base. The acid concentration is 0.20M, what should the molarity of the base be to guarantee the 5:1 ratio?

2. You need to prepare 100 mL of a solution that is 1:5 ratio of acid to base. The final molarity of the base you wish to have is 0.10M.

a. What should the molarity of the acid be to keep the 1:5 acid to base ratio?

b. You have available 0.50 M acid and 0.50 M base solutions, how many mLs of each substance will you need to use that when diluted to 100 mL you will obtain the desired concentrations?

Explanation / Answer

1. )

ratio of acid to base = 5 : 1 = 5 / 1

concentration of acid = 0.20 M

concentration of base = 0.20 / 5 = 0.04

molarity of the base should be = 0.040 M

2)

a)

ratio of acid to base = 1 : 5

molarity of base = 0.10 M

Molarity of acid = 0.02 M

b)

volume of each substance = 50 mL

both are same concentrations = 1 : 1

so volume of each substance = 50 mL

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