the chemical that causes temporary hardness, the compound that causes permanent hardness , floculating agent , The chemical composition of limescale, atomic absorption spectra - how we test for heavy metals, the agent used to precipitate heavy metals, the 2nd stage of sewage treatment - biological, the name of the chemical used to test for chlorine - DPD tablet, colorimeter - a piece of equipmemt that shines light through a sample, comparator - a piece of equipmemt used to work out chlorine concentrations by a rotating wheel that is matched to a colour, 0.5ppm - the level of chlorine in drinking water, 3-5ppm - the level of chlorine in swimming pools, free chlorine molecules, the agent used to test for hardness - ethylenediamine tetra-acetic acid , the indicator used in the hardness titration - eriochrome black t, BOD conditions - 20 degree Celsius, 5 days in the dark, eutrophication - overgrowth of algae due to excess nitrates and phosphates, stage 3 of sewage treatment - chemical removal of nitrates and phosphates, fluoride - the chemical added to water for tooth health, floculation - the gathering of small particles into larger clumps by the addition of a flocculating agent ,

Leaderboard

Visual style

Options

Switch template

Continue editing: ?