DRINKING WATER 0.0 / 5 ? ChemistryMethods of SeperationGCSEEdexcel Created by: sara.5Created on: 14-04-18 13:43 What is meant by Desalination? A process that produce fresh drinking water by separating the water from salt in salty water 1 of 12 Why is Desalination not suitable for large producing drinking water on a large scale? Because desalination requires a lot of energy due to the relatively high melting point of water 2 of 12 What is chemical analysis? Chemical analysis involves using chemical reactions or sensitive machines to identify and measure the amount of substance in a sample. 3 of 12 Why should the water in chemical analysis not contain any salts? Because incorrect results will be obained 4 of 12 Why does tap water form unexpected cloudy precipitate? Because it contains small amount of dissolved salt 5 of 12 Where does the raw material for producing water come from? Aquifiers and lakes 6 of 12 Where are the water in these sources use for? Resivoirs 7 of 12 What happens in screening? Sift out large materials eg twigs and leaves 8 of 12 What happens in sesimentation? Small insoluble particles are let to settle out 9 of 12 What happens in Filtration? Sand and Gravel act as a filter to remove smaller insoluble particles 10 of 12 What happens in Chlorination? A chemical is added to kill micro organisms 11 of 12 Why is water often analysed? To test how safe it is and measure its mineral content 12 of 12
Comments
No comments have yet been made