1 Copper and PVC water pipes are relatively non-toxic. 2  Copper is a natural material that has been proven to be safe to health. 3  PVC pipes are also safe. 4  Lead on the other hand is extremely toxic. 5  Lead is corrosive and can leak into the drinking water system. PVC is likewise a safe material to carry drinking water. 2  Copper and PVC water pipes do not suffer easily from corrosion, while iron corrodes relatively easily. 3  Copper is relatively easy to work with because it is much softer than iron or lead.
Advanced. Stoichiometry determines the quantitative relationships between reactants and products. Stoichiometric relationships are based on the laws of conservation of mass and energy and the law of combining weights or volumes.
Page 2 - Unit GH8 - Session 2. Â© Copyright Habia 2009 - All rights reserved. 2.6 The importance of personal hygiene. 2.7 Why it is important to check electrical. equipment used to aid the. conditioning and treatment process. 2.8 Methods of cleaning, disinfecting and. sterilisation and their suitability for use in. salons.