A laboratory stock solution is 1.50 M NaOH. Calculate the volume of this stock solution that would be needed to prepare 300. mL of 0.200 M NaOH. a. 2.25 mL b. 10.0 mL c. 40.0 mL d. 1.0 mL e. 0.100 mL

Option c. 40 mL

Explanation:

Dilution formula:

M Concentrated . Concentrated Volume = Diluted volume . M diluted

1.50 M . Concentrated volume = 300 mL . 0.200 M

Concentrated volume = (300 mL . 0.200 M) / 1.50 M

Concentrated volume = 40 mL

When the dilution factor is applied, it is indicated how many times a concentration is diluted to obtain a lower solute concentration, so its concentration depends on the number of solute particles and the total volume

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

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