Wednesday, 24 October 2018

Water Pollution

Water Pollution

What is Pollution
Explained below is Water pollution which is kind of hazardous pollution. 

Water Pollution 

When water body is polluted, it threatens aquatic life on both fresh water bodies, oceans and seas.

Fresh water is polluted through the discharge of sewage and other waste substances from farms and also from industries.

Marine pollution is mostly caused by oil spillage, industrial waste, agricultural waste and other waste matter.

Effects of Water pollution

1) Sewage can contaminate drinking water.
2) Aquatic life will be affected.
3) Gammalin 20 has a killing effect of fishes.
4) It makes water unfit for recreational purposes and swimming.
5) Odours emanating can be embarrassing.
6) Epidemic diseases like cholera and diarrhea are very common.
7) Excessive use of pesticides and fertilizers can drain into the rivers to kill aquatic animals.
8) Thermal heat from refineries, steel mills, breweries, causes increase in temperature of rivers.
9) Eutrophication causes depletion of oxygen in water.

Friday, 5 October 2018

Air pollution

Read the previous post on Pollution to get the concept. 

What is Air Pollution?

This is mainly caused by air-borne particles, such as; smoke, carbon dioxide, Sulphur dioxide, carbon monoxide, Oxides of Nitrogen, hydrocarbons, chloro fluorocarbon, hydrogen Sulphide and dust.

Effects of Air Pollution 
1) It can cause bronchitis.
2) It can cause Silicosis.
3) It can lead to eye and nose irritation.
4) It can poison the blood forming carboxyl haemoglobin.
5) It can green house effect.
6) Dust and smoke can cause asthma.
7) Lead poison can affect children's IQ.
8) Nitrogen oxide irritates the lungs.

Control of Air Pollution 
1) Industries should be sited away from residential areas.
2) Passing of wastes through filters and absorbents should be put to practice.
3) The use of lead free fuels is important.
4) Avoid driving cars that are not well maintained.

Tuesday, 11 September 2018

Chemistry: Molar Mass, Examples and Solutions

Molar mass

The formula mass or molar mass of a compound is the mass of the correctly written formula or one molecule of the compound, obtained by adding together the appropriate relative atomic masses of the atoms of the elements present in the molecule.

Sunday, 2 September 2018

Monday, 16 July 2018

Periodic table: periodic law, groups, periods

Periodic Table
Table of Contents
1) What is periodic table?
2) What is the periodic law?
3) What are Groups?
4) What are periods?
5) Families of Elements
6) Group 0 to 7 properties.

Periodic table
The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number and electron configuration. The periodic table is divided into eight (8) vertical columns known as "Groups" and eight (8) horizontal columns known as "Periods".