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A titration is a method for determining an unknown concentration of a substance, by using a substance with a known concentration (standard solution).

How to perform a titration video

By using the volumes of each (both the known and unknown), a chemist can determine the concentration of the unknown.

M_aV_a=M_bV_b    

 V=volumes (must be in the same units)

M_a= concentration of the H+  (**note 2M H₂SO₄ is really 4M H⁺)

M_b= concentration of OH^- (2M Ca(OH)₂ is really 4M OH^-)

Past regents questions

June 2010-28 During which process can 10.0 milliliters of a 0.05 M HCl_(aq) solution be used to determine the unknown concentration of a given volume of NaOH_(aq)solution?
(1) evaporation    (3) filtration
(2) distillation       (4) titration

Jan 2010-24 The data collected from a laboratory titration are used to calculate the
(1) rate of a chemical reaction
(2) heat of a chemical reaction
(3) concentration of a solution
(4) boiling point of a solution

Aug 2009-49 A student completes a titration by adding 12.0 milliliters of NaOH_(aq) of unknown concentration to 16.0 milliliters of 0.15 M HCl_(aq). What is the molar concentration of the NaOH(aq)?
(1) 0.11 M     (3) 1.1 M
(2) 0.20 M     (4) 5.0 M

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