is tap water a pure substance..?
http://www.chem4kids.com/files/matter_mixture.html
No, it's mixed with some chlorine and also has dissolved carbon dioxide from the atmosphere.
Not all tap water is mixed with chlorine. Water that comes from a private well does not usually have chlorine in it.
To determine if tap water is a pure substance, we need to understand the definition of a pure substance. A pure substance is a material with a constant composition and properties throughout. It consists of a single type of particle, either an element or a compound.
Tap water is not considered a pure substance because it is a mixture. It contains various substances dissolved or suspended in the water. For example, tap water often contains minerals, such as calcium and magnesium, as well as small amounts of other substances like chlorine or fluoride, which are added to enhance water quality.
If you have tap water, you can perform a simple test to further confirm that it is not a pure substance. You can evaporate a sample of tap water in a clean container, such as a glass dish, over time. As the water evaporates, any dissolved minerals or substances will remain as a residue or solid deposit in the container. This residue indicates that tap water is a mixture rather than a pure substance.
It is worth mentioning that while tap water is not a pure substance, it is generally safe for consumption due to strict water quality standards and treatment processes in place to ensure its safety.