16 Questions
What are the objectives of water analysis?
To be aware of water properties and classification, understand the water analysis (physical and chemical examination), be aware of water hardness and its classification, know various methods for determination of water hardness, be aware of detection of gases in water, know different methods for determination of metals in water, understand the different sources of water pollution, be able to test for water pollution
What are the properties of water?
Clear, transparent, tasteless, odorless, colorless in small quantities, freezes at 0°C, boils at 100°C, greatest density at 4℃, dissolves almost all substances
At what temperature does water boil under normal pressure?
100°C
What is the freezing point of water?
0°C
What are the three classifications of water according to purity?
Pure water, Polluted water, Contaminated water
List the three classifications of water based on the source.
Rain water, Surface water, Underground water
What are the four classifications of water according to its uses?
Potable water, Irrigation water, Industrial water, Pharmaceutical water
What are the three requirements for taking a representative water sample?
Sample taken must be representative, Samples doesn't deteriorate or becomes contaminated, Store sample in bottle made of inert material
What are the three sources from which representative samples should be taken?
From lines, from wells, from river or stream
What is the definition of total solids in water analysis?
Total solids is the residue left after evaporation of sample water, drying at 103°C, cooling in desiccator, and weighing until constant weight.
List the four physical examinations of water.
Color, Odor, Turbidity, Electrical conductivity
How can the total fixed solids in water be determined?
Total fixed solids can be determined by igniting total solids in an electric muffle at 600 ºC.
What is the range of pH for most natural water?
Most natural water has a pH range from 4-9.
What does a high value of volatile solids in water analysis suggest?
Sewage pollution may be suggested by the high value of volatile solids.
What is the normal pH of pure water at 25°C?
The normal pH of pure water at 25°C is 7.
What is the main cause of water alkalinity?
Alkalinity of water is mainly due to the presence of CO32- and HCO3-.
Test your knowledge of water properties, classification, water analysis, water hardness, determination methods, detection of gases in water, and determination of metals in water.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
