Final answer:
The volume of distilled water can be measured using different instruments such as a graduated cylinder or a volumetric flask.
From the given options, the volume of distilled water is 20 ml (option 4).
It's important to note that for accurate measurements, the meniscus of the liquid should be at eye level when taking the reading.
Step-by-step explanation:
To determine what is the volume of distilled water in a volumetric process, we follow a series of steps which include filling a volumetric flask to a certain calibration mark and estimating the volume by reading the bottom of the meniscus. According to the given reference, the volume of distilled water is estimated to be between 19.8 ml and 20 ml, with further approximation indicating approximately 19.9 ml. From the given options, the volume of distilled water is 20 ml (option 4).
When considering options like 1) 5 ml, 2) 10 ml, 3) 15 ml, these do not match our observational data. Thus, although these volumes are used in various laboratory tasks such as using micropipettes or volumetric glass pipettes, none of them is the answer in this context. It's also important to note that measurements should always be made with precision, taking into account potential distortions of the measuring device like a graduated cylinder.