Water By Neil Bronks Water is important 70% of the earth 89% of the human body Only 3% is fresh and most of that is in the polar ice caps.

Slides:

Advertisements

Similar presentations

Hard Water & Soft Water.

Advertisements

Water CHEMISTRY 2 Additional Science Chapter 8. The Importance of Water Water is essential to life on Earth Water is used widely as a solvent in industrial.

Filtration of Water in the Recharge Zone  Water travels through soil, sand/clay to the aquifer.  What if any contaminates are removed by these layers.

Chemistry C3 Part Two Revision PowerPoint - Big ideas Hard water.

TENNYSON BEN-KALIO A CHE 120 PROF. WAN JIN JANHG.

About 70% of the earth’s surface is covered with water.

Water Pollution JUST WHY IS WATER SO IMPORTANT???.

Why is our water not “pure” and what makes it hard or soft?

Water Supply and Sewage Year 7 Unit 4.4. Water debate Is it ok to drink recycled sewage? Is it ok to drink recycled sewage? With Australia in the grips.

Chapter 12 – Water: Removing Dissolved Solutes

Water Supply & Management Obj: Discuss the nature, importance and sources of water.

Water By Miss Buicke.

Water on Earth We know that 70% of Earth is water. What percent of water is freshwater? 3% 97% of water is found in oceans. 2% is frozen in glaciers and.

Water: Removing dissolved solutes. Precipitation reactions When two solutions are mixed and a solid forms it is called a precipitation reaction The precipitate.

Water and Solubility Write a definition for these words: Solute: Solvent: Solution: Atmospheric water vapour Run-off Transpiration Atmospheric water vapour.

Water Treatment. What is the chemical formula for water?? H 2 O What do these letters mean? (Look at the periodic table) H = Hydrogen O = Oxygen Water.

Treating Drinking Water Treatment Plant Water Distribution.

Human Impact on the Environment Minerals in Water.

Water. Water Water is a very unusual compound; it is very common and is found in all three conditional states, solid (as ice), liquid (as water) and gas.

Water to Drink Where does our drinking water come from?

Water Treatment Process We get water from lakes and streams and wells (aquifers) and other water sources from nature. However, nature is full of dirt,

12.6 – How can we use ions in solutions?

Water treatment Lilly Corradi.

Chapter 1.D. Water Cycle.

The Drinking Water Treatment Process

C3 2.3 Water Treatment.

Hard Water When washing with soap, do you find that the soap does not lather or leaves a floating scum on the surface of the water? This is HARD WATER.

Waste water treatment List the primary pollutants found in waste water and identify their sources. Outline the primary, secondary and tertiary stages of.

Screening: Wastewater entering the treatment plant includes items like wood, rocks, and even dead animals. Unless they are removed, they could cause problems.

Water To Drink. Water Quality The degree of purity of water, determined by measuring the substances physical, chemical and biological in water, besides.

Water and Wastewater Treatment

Where does our drinking water come from? This means the water we drink has run through and across rocks.

BOREHOLE - a deep, narrow hole made in the ground, especially to locate water or oil. Providing people with clean drinking water is a major issue all.

Solvents and solutions. Pure water and impure water Pure water contains no other substances mixed with it (dissolved or not dissolved). Water from rivers,

The Water Cycle. What are some things that you think are in your water?

Water Chapter 20 There is the same amount of water on Earth as there was when the Earth was formed. The water from your faucet could contain molecules.

Water and Humans go hand in hand!!!. Importance of Water to human life Next to oxygen, water is the most essential element to human life; the body usually.

1 The Chemistry… …of WATER?. 2 Water is a CHEMICAL? Water is one of our most abundant chemicals Chemical Formula is H 2 O most recognized of all the chemical.

ENVIRONMENTAL SCIENCE 5.4 The Waterworks. At the Waterworks When reservoirs or rivers are the source of drinking water, the water must be treated to remove.

The Waterworks Section 5.4. How does fresh water reach you? Ancient Romans built aqueducts – canals to carry water from the mountains to the city… some.

Drinking Water & Dissolved Oxygen in Water. Water Highly polar Forms Hydrogen bonds Has the ability to dissolve many chemicals.

Unit 5C WATER QUALITY. STUFF ABOUT WATER WATER DISSOLVES MANY THINGS NEARLY “UNIVERSAL SOLVENT” H2O.

Water Why is water so important to us? ● We cannot live without water. ● We need water for washing, cleaning, cooking. ● Water carries sewage away from.

 Water that sinks deep into the zone of saturation and fills available spaces in cracks and between grains of sediment or rock.

To compile a flow diagram of the WHOLE water treatment process.

Water Purification and treatment

CHAP. 2.2 – WATER TO DRINK.

Unit 5 – Fresh and Salt Water Systems

WATER QUALITY (Chapter 22)

MULTIPLE CHOICE QUESTIONS

About 70% of the earth’s surface is covered with water.

Water Treatment.

Chapter 12 – Water: Removing Dissolved Solutes

Water Treatment.

Water Hardness Hard water Soft water Removal of Hardness from water

Water Properties of Water Water Cycle Water Treatment Hard/Soft Water

Water H2O What do the students think of when they see this picture?

Water Hardness.

Water Chapter 33.

Polarity of Water and other Special Properties!

Chapter 15 SEction 9 How is Water Purified?

Water Treatment.

Learning Objective Describe how we produce potable water

Chapter 15 SEction 9 How is Water Purified?

Water Treatment.

Presentation transcript:

Water By Neil Bronks

Water is important 70% of the earth 89% of the human body Only 3% is fresh and most of that is in the polar ice caps

Water is a compound Chemically bonded atoms of Oxygen and Hydrogen H H H H O O O H H O H H 2H 2 + O 2 2H 2 O

Ice Floats Most substances contract and get denser as they become a solid More dense solid sinks

Ice Floats Ice expands and so floats on water. Lucky for us Less dense solid floats

Frozen Pond

Water Cycle

Water Treatment Screening - Clean water passes through the screen and large objects do not

Sedimentation Alum (Aluminium Sulphate) is added that makes all the dirt stick together. Most sinks

Then Filter through sand

Add Chlorine Kills the bacteria Cl

Add Fluorine Prevents tooth decay F

Water Treatment Screening - Clean water passes through the screen and large objects do not pass Sedimentation - Aluminium Sulphate is added. It is mixed slowly and then allowed to settle. Filtration – passes through sand Add chlorine to kill bacteria. Add flourine to prevent tooth decay.

Desalination Removing salt Clear Plastic Sea Water Pure Water Stone

Electrolysis of Water

Water separated into gases using electricity Some acid must be added to increase conduction

Algal Bloom Too much fertiliser or food waste can feed algae causing a harmful algal bloom This uses up all the oxygen and kills fish

Hard and soft water Add soap and mix Add Soap solution Hard Water Few Bubbles Oily scum Soft Water Lots of Bubbles

Hard Water Contains dissolved calcium and magnesium ions Forms scum when soap is used Scale on inside of pipes and kettles

Where hard water comes from Acid Rain Limestone Water dissolves the limestone (Calcium Carbonate) and the calcium ions make the water hard Water that runs off straight to rivers and lakes is soft water

Removing Hardness from water Distillation Ion exchange with Zeolite resins Soft water better for industry and plumbing Hard water better for your heart

Advantages and Disadvantages of Hard and Soft Water AdvantageDisadvantage Hard Good for Heart and Beer Scale in pipes Soft Good for washing clothes Girl children

Summary

H/w P 250 Q 1,2,4,5,6,8.