A small amount of insoluble residue remain.
It would be a mixture of various minerals and chemicals if any were present in the water before evaporation
Why is tap water being used as a test substance
Tap water is a mixture becasue of the differnet chemicals in water.
Normal tap water can be considered as fairly pure and homogeneous; only ultrapure water is correctly pure. Sometimes tap water may contain insoluble impurities.
Tap water is a mixture of water (H2O) and minerals used to purify it.
Evaporation occur at any temeperature but a high temperature or a low pressure favors evaporation.
Tap water is not a pure substance because it is mixed with chemicals that purify it and if it was from the ground it has naturally occurring minerals mixed in it.
oils are insoluble in water
City tap water contains many substances dissolved in it. So city tap water is a mixture. Different types of gasses, substances can be dissolved in this water.
Tap water is not a pure substance because it is mixed with chemicals that purify it and if it was from the ground it has naturally occurring minerals mixed in it.
This depends on many factors.
it is a pure substance if your still unsure google it