Classification of Matter, pH. Properties of Water Flashcard

Front

What is the pH of pure water?

Back

The pH of pure water is 7.

Front

What happens to the pH of water when a base is added?

Back

The pH will increase and become more basic.

Front

What is a characteristic property of acids?

Back

Acids turn blue litmus paper red and have a sour taste.

Front

Which property is NOT associated with acids?

Back

They feel slippery.

Front

What is a heterogeneous mixture?

Back

A mixture that has a non-uniform composition, where the different components can be seen.

Front

What is a pure substance?

Back

A material that has a constant composition and consistent properties throughout.

Front

What is the difference between a compound and an element?

Back

A compound is made up of two or more elements chemically combined, while an element is a pure substance that cannot be broken down into simpler substances.

Front

What is the pH of a neutral substance?

Back

The pH of a neutral substance is 7.

Front

Which of the following is closest to neutral: Tea, Eggs, Water, Toothpaste?

Back

Water is closest to neutral.

Front

What do the molecules in a compound represent?

Back

The molecules in a compound represent a chemical combination of two or more different elements.