au edu.ca or by getting them from another browser. Multiple Attempts This test a

Question

au edu.ca or by getting them from another browser. Multiple Attempts This test allows 3 attermpts. This is attempt number 3 Force Completion This test can be saved and resumed later. Question Completion Status: QUESTION 1 1 points A solution was prepared by diluting 0.10 ml of NaOH stock solution into 10.0 mt. If the the final concentration of NaOH in the prepared solution s 0.025 M, what was the initial concentration (M) of NaOH in the stock solution? OA..40 M OB. 5.0 M @C2.50 M OD. .0025 M .40.0 M 1 points QUESTION 2

Explanation / Answer

use dilution formula

M1*V1 = M2*V2

1---> is for stock solution

2---> is for diluted solution

Given:

M2 = 0.025 M

V1 = 0.1 mL

V2 = 10.0 mL

use:

M1*V1 = M2*V2

M1 = (M2 * V2) / V1

M1 = (0.025*10)/0.1

M1 = 2.50 M

Answer: C

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