Final answer:
d. titration
The process of determining the amount of acid or base in a sample by adding a known amount of base or acid until neutralization is called titration. It is commonly used in chemistry to find the concentration of an unknown solution by using a buret and an indicator.
Step-by-step explanation:
The determination of the amount of acid/base in a sample by adding a known amount of base/acid to match the unknown amount is known as titration. This technique involves a neutralization reaction, where an acid reacts with a base to produce water and a salt.
In an acid-base titration, you would use a buret to deliver a solution of known concentration (the titrant) to react with the unknown sample.
By gradually adding the titrant and using an indicator to signal the end of the reaction, you can determine the concentration of the unknown acid or base based on the volume of titrant used and its known concentration.