2006-09-10 11:02:25 · 4 answers · asked by rocks 1 in Science & Mathematics ➔ Biology
The reason is that regular tap water has many impurities like minerals. Distilled water is used for experiments because distilled water does not have impurities that might affect the experimental results. One main advantage is the lack of ions. For example, tap water contains fluoride in many areas, which can affect your experiments. A cheaper alternative to distilled water is deionized water, which affects the active chemicals(ions).
2006-09-10 12:32:38 · answer #1 · answered by sivla_123_8 2 · 0⤊ 0⤋
Its a control. You know if you get a reaction or something growing in the distilled water that you had some contamination in your experimental process.
2006-09-10 11:04:50 · answer #2 · answered by April C 3 · 1⤊ 0⤋
distilled water is boiling water, collecting the condensation hence its free of sediments, chemicals, bacteria etc. some chemicals in your experiment might react to the things in tab water. every trial would be similar,
2006-09-10 11:06:43 · answer #3 · answered by cars_o_holic 3 · 1⤊ 0⤋
Its used as a negative control.
2006-09-10 12:24:20 · answer #4 · answered by davidosterberg1 6 · 0⤊ 0⤋