Which of the following are true regarding acid-base titrations?
A They are used to determine the concentration of an unknown acid or base.
B The acid or the base must be a standard solution with a known concentration
C The standard solution is titrated into the chemical with the unknown concentration.
D All of the above are true regarding acid-base titrations.
D?
I've been doing this for a Looooong time and I don't know how to answer this. A is true. B is true, C is the problem. It CAN be titrated either way but it isn't necessary to titrate it that way. So I would go with A and B being true and since it need not be titrated the way in C I would not say that was true. It's just poorly worded answers.
Yes, the correct answer is D. All of the statements A, B, and C are true regarding acid-base titrations.
To determine the concentration of an unknown acid or base, acid-base titrations are commonly used. In order to accurately perform the titration, either the acid or the base being tested must be a standard solution with a known concentration. This known concentration is used as a reference to determine the concentration of the unknown solution.
During the titration process, the standard solution with the known concentration is gradually added (titrated) into the solution with the unknown concentration. This is often done using a burette, with the volume of the added solution being carefully measured as it is being added. The reaction between the acid and base is monitored until the equivalence point is reached, which is when the stoichiometrically equivalent amounts of acid and base have been reacted.
By measuring the volume of the standard solution required to reach the equivalence point, along with knowledge of the concentration of the standard solution, the concentration of the unknown acid or base can be calculated. Hence, all of the statements A, B, and C are true, making option D the correct answer.