Question

Bradley has been given a sample of HCl and NaOH. He knows that the NaOH has a concentration of 1.0M, but the HCl concentration is unknown. Which of these would be the BEST lab procedure to determine the strength of the acid?

Answer 1

titration

Step-by-step explanation:

The purpose of a titration is to experimentally determine the neutralization points of acids and bases, and in turn, the data can help determine the unknown concentration.

Answer 2

Titration

Step-by-step explanation:

Titration is a method to determine the concentration of an unknown solution by using a known concentration solution.

The known concentration solution (titrant) - NaOH 1.0 M is added through the burette to the flask containing unknown concentration solution (analyte) - HCl. For example, if the volume of NaOH used to neutralise 20 ml of HCl is 10 ml, the concentration of HCl is 0.5M. To elaborate,

Equation: NaOH + HCl → NaCl + H2O

moles of NaOH = Concentration (mol/L) x Volume (L) = 1.0 x 0.01 = 0.01 mol

moles of NaOH = moles of HCl = 0.01 mol

⟹ concentration of HCl = moles / Volume = 0.01/0.02 = 0.5M.