Cloro na piscina

Synopsis: a man wants to treat the water in your home pool using chlorine. The grandkids come visit him soon and the pool water must be correct. Your piscineiro has not come and he did not know what to do. Gets worried and talk to your neighbor who is a chemical engineer and teaches you to use chlorine in pool water as well as on some chemical properties of chlorine.
Source: Unicamp - M3, Mathematics Multimedia.
URL: http://m3.ime.unicamp.br/recursos/1068.