Why is filtering a physical change

Read times. They've given me six steps in water purification and asked that I classify them under physical or chemical changes. I've done that but would like to know if how I have classified them is correct. Physical: A rudimentary filter made of metal bars is used to filter large particles and waste, like cans and bottles Flocculation addition of aluminum sulfate and lime Vaporize the water in air. Chemical: Adding chlorine to the water in order to kill bacteria and virus.

Passing the water through a gavel bed and sand in a filtration reservoir. A second chlorine treatment to kill any leftover bacteria. Thank you! I think flocculation would be chemical and I think passing the water through a gavel bed and sand in a filtration resevoir would be chemical.

Chemical would actually change the original product and physical would not. See Answer. Best Answer. Study guides. Science 20 cards. Who is known as the first African American scientist. What is Luis Alvarez's cultural background. What was Benjamin Banneker's ethnic background. Which scientist used mathematical knowledge to calculate the exact measurement of the meter.

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Q: Is filtering a physical or a chemical change? Write your answer Related questions. Is filtering coffee a physical or chemical change? Is filtering charcoal a physical or a chemical change? Is filtering the sand and water a physical change or chemical change? Are filtering air to remove dust and pollen a physical and chemical change? Is filtering a mixture a chemical or physical change?

This relatively simple procedure caused more than a few headaches for federal authorities in the s during the era of Prohibition, when illegal stills proliferated in remote regions of the United States. Filtration is any mechanical, physical or biological operation that separates solids from fluids liquids or gases by adding a medium through which only the fluid can pass.

The fluid that passes through is called the filtrate. There are many different methods of filtration; all aim to attain the separation of substances. Separation is achieved by some form of interaction between the substance or objects to be removed and the filter.

The substance that is to pass through the filter must be a fluid, i. Methods of filtration vary depending on the location of the targeted material, i. This page was constructed from content via the following contributor s and edited topically or extensively by the LibreTexts development team to meet platform style, presentation, and quality:.

Learning Objectives Label a change as chemical or physical. List evidence that can indicate a chemical change occurred. Physical Change Physical changes are changes in which no bonds are broken or formed.

Some types of physical changes include: Changes of state changes from a solid to a liquid or a gas and vice versa. Separation of a mixture. Physical deformation cutting, denting, stretching. Making solutions special kinds of mixtures. Public Domain; Moussa. Observations that help to indicate chemical change include: Temperature changes either the temperature increases or decreases. Light given off. Unexpected color changes a substance with a different color is made, rather than just mixing the original colors together.

Bubbles are formed but the substance is not boiling—you made a substance that is a gas at the temperature of the beginning materials, instead of a liquid. Different smell or taste do not taste your chemistry experiments, though!

A solid forms if two clear liquids are mixed look for floaties —technically called a precipitate. Boiling water. A nail rusting. A green solution and colorless solution are mixed. The resulting mixture is a solution with a pale green color. Two colorless solutions are mixed. The resulting mixture has a yellow precipitate. Solution Physical: boiling and melting are physical changes. When water boils, no bonds are broken or formed. Color changes indicate chemical change. The green mixture is still green and the colorless solution is still colorless.