Question

why is it important to use demineralized water?
a) because demineralized water poses less of a health hazard in chemical laboratories
b) because demineralized water has a lower density than regular tap - water
c) because demineralized water has a higher boiling point than regular tap - water
d) because demineralized water doesnt contain minerals

Explanation:

Demineralized water is water from which minerals have been removed. In chemical laboratories and many other applications, the absence of minerals is crucial as minerals can interfere with chemical reactions, contaminate samples, or cause scaling in equipment. Options b and c are incorrect as demineralized water's density and boiling - point are similar to regular water under normal conditions. While option a is a benefit in some cases, the fundamental property is the lack of minerals.

Answer:

d) Because demineralized water doesn't contain minerals