02 Oct Bases and acids: what´s happening in the English science lab?
English Lab 5th Primary graders have observed what happen when they pour red cabbage juice in four flasks and add carbonate, vinegar, lemon juice to each flask.
Acids and bases are two special kinds of chemicals. Almost all liquids are either acids and bases to some degree. Whether a liquid is an acid or base depends on the type of ions in it. if it has a lot of hydrogen ions, then it is an acid. If it has a lot of hydroxide ions, then it is a base.
Scientists used something called a Ph scale to measure how acidic or basic a liquid is. Ph is a number to 0 to 14. From 0 to 7 are acids, with 0 being the strongest. From 7 to 14 are bases with 14 being the strongest base. If a liquid has a Ph of 7, its neutral. This would be something like distilled water.
Acids with a low ph of around 1 are very reactives and can be dangerous, the same is true for bases near 13. Chemists use strong acids and bases to get chemical reactions in the lab. Although they can be dangerous, these strong chemicals can also be helpful for us.