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Trascrizione

What is precipitation in a water cycle?

The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation. The water falling on land collects in rivers and lakes, soil, and porous layers of rock, and much of it flows back into the oceans, where it will once more evaporate. The cycling of water in and out of the atmosphere is a significant aspect of the weather patterns on Earth

Precipitation

Precipitation is a vital component of how water moves through Earth’s water cycle, connecting the ocean, land, and atmosphere.

Precipitation is the process when water comes down on earth in various forms. It can come in the form of sleet, snow and rain.

Precipitation happening in the world throughout the year

Real Life Examples of Precipitation

DO YOU KNOW?

> How precipitation reactions are used in water treatment?

-> The Water Cycle

Future Implications

Precipitation

Examples

Precipitating lead in our water systems will allow it to be removed.

In the future, perhaps we would also be able to do this with other pollutants in our water.

Sodium Chloride is an aqueous solution with the chemical formula NaCl.

All common nitrates are soluble. Silver nitrate is an aqueous solution with the formula Ag(NO)3

Sodium

Chloride solution

Silver nitrate solution

Additional examples :

The Reaction between AgNO3 and NaCl

> reaction between Sodium chloride and silver nitrate.

> reaction between magnesium chloride and ammonium carbonate.

Thank you for watching our presentation.. hope you all enjoyed it

Done by Rameen, Jennifer and Elhan

The Products

After the reaction a white solid of AgCl is formed which is known as a Precipitate.

INTRODUCTION

Everyday examples of precipitation reaction

Good morning Ms. Baik and my peers, today our group will present a short prezi on explaining double displacement-precipitation reactions!

Making of Pigment...

Do you know?

DOUBLE DISPLACEMENT REACTIONS- PRECIPITATION

How does this happen?

- What is another name given to double displacement(precipitation)reactions?

-How do we use these reactions in our daily life?

-How does precipitation take place in the water cycle?

During the process of making a pigment , silver nitrate plus sodium chloride produces silver chloride and sodium nitrate. In this case , the liquid which is formed is called the supernate (NaNO3) and AgCl is the precipiate.

WHAT IS A PRECIPITATION REACTION ?

The General Equation

AB + CD > AD + CB

Example of a precipitation reaction :

If a reaction between aqueous reactants produces an insoluble product, that product is called a precipitate.The solution that remains is called the supernate.

When does precipitation reaction happen?

2KI(aq) + Pb(NO3)2(aq)

-> 2KNO3(aq) + PbI(s)

If either the cation or the

anion is higher on the

solubility table and is

insoluble, the compound will

become a solid.

The most dramatic reaction takes place between Potassium Iodide and Lead (II) nitrate

Double Displacement - Precipitation

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