Brronsted-Lowry Theory Lab Solution
Many chemical compounds are broken down into two very distinct categories: acidic or basic. Acidic, based on the Bronsted-Lowry Theory, is defined as a proton (H+) donor. An equation exemplifying an acid dissolving in water is:
HCl (g) H2O H+ (aq) + Cl- (aq)
A base, based on the Bronsted-Lowry Theory, is defined as a proton (H+) acceptor. An equation exemplifying a base dissolving in water:
NaOH (s) H2O Na+ (aq) + OH- (aq)
Molarity, also known as the concentration, is represented as moles of the measured substance divided by the volume in dm3. It is a value of the amount of substance in a given volume. The amount of substance is measured using the unit moles. According to Ryan (2015, p. 38), a mole is the amount of pure substance containing the same …show more content…
The point of equivalence is the point where the acids and bases have been added equally. The change from colorless to pink represents the end point of the reaction, indicating that the concentration of the acid can be measured. The point of equivalence will result at a pH of seven in the titration of sulfuric acid and hydrochloric acid with sodium hydroxide.
The aim of the experiment is to find the unknown concentrations of the acids (Sulfuric and Hydrochloric) with the use of titration, using 50 cm3 of 0.1 M solution of the base (NaOH) as a titrant. In addition, the measured volume of the base consumed is used to reach the end point.
Hypothesis: It is expected to, at the end point of the experiment, the solution within the conical flask with both the acid, base, and indicator, will turn from a clear transparent color to a permanent pink color due to it being