What is the principle of acid-base titration?
What is the principle of acid-base titration?
Acid-base titrations depend on the neutralization between an acid and a base when mixed in solution. The endpoint and the equivalence point are not exactly the same: the equivalence point is determined by the stoichiometry of the reaction, while the endpoint is just the color change from the indicator.
Why AC current is used in conductometric titration?
Since in AC current, equal current flows in both directions over a given amount of time(larger enough than time period), reaction takes place in both the directions. On an average, no chemical change in composition would be observed.
What is the equivalence point of the titration?
Equivalence point: point in titration at which the amount of titrant added is just enough to completely neutralize the analyte solution. At the equivalence point in an acid-base titration, moles of base = moles of acid and the solution only contains salt and water.
Which comes first equivalence point or endpoint?
Equivalence point, also called stoichiometric point, in a nutshell, is a point where the moles of the two solutions, acid and base, are equivalent or equal. The stage occurs before the endpoint, which signals the completion of the reaction.
What is the pH at the equivalence point of NaOH and H2SO4?
At the equivalence point, equal amounts of H+ and OH- ions will combine to form H2O, resulting in a pH of 7.0 (neutral). The pH at the equivalence point for this titration will always be 7.0, note that this is true only for titrations of strong acid with strong base.
How much base is needed to neutralize an acid?
When hydrochloric acid is reacted with sodium hydroxide, an acid/base mole ratio of 1:1 is required for full neutralization.
Can a strong base neutralize a weak acid?
When a strong acid neutralizes a weak base, the resulting solution’s pH will be less than 7. When a strong base neutralizes a weak acid, the resulting solution’s pH will be greater than 7….Weak Acid-Weak Base Neutralization.
| Strength of Acid and Base | pH Level |
|---|---|
| Strong Acid-Weak Base | <7 |
| Weak Acid-Strong Base | >7 |
How do you neutralize a strong acid?
To neutralize acids, a weak base is used. Bases have a bitter or astringent taste and a pH greater than 7. Common bases are sodium hydroxide, potassium hydroxide and ammonium hydroxide. Bases are neutralized by using a weak acid.
Does salt neutralize acid?
In acid – base chemistry, salts are ionic compounds that result from the neutralization reaction of an acid and a base. Basic salts contain the conjugate base of a weak acid, so when they dissolve in water, they react with water to yield a solution with pH greater than 7.0.