Understanding Compounds and Mixtures

Understanding Compounds and Mixtures

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Liam Anderson

FREE Resource

The video explores whether water is an element, compound, or mixture. Historically, water was considered an element in classical elements. In chemistry, water is a compound, H2O, due to the chemical bonds between hydrogen and oxygen atoms. Tap water, however, is a mixture because it contains various substances like calcium ions and chlorine, which are not chemically bonded. The video concludes by differentiating water's classification based on context.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Historically, which of the following was NOT considered one of the classical elements?

Water

Earth

Fire

Metal

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In chemistry, what is the chemical formula for water?

H2

HO2

O2H

H2O

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of bond holds the hydrogen and oxygen atoms together in a water molecule?

Ionic bond

Covalent bond

Metallic bond

Hydrogen bond

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes distilled water?

A mixture

A compound

An element

A solution

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What additional substances might you find in tap water?

Only hydrogen atoms

Only H2O molecules

Calcium ions and chlorine gas

Pure oxygen

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is tap water considered a mixture?

It is a pure compound

It contains only H2O molecules

It has substances that are chemically bonded

It contains different substances not chemically bonded

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a classical sense, water was historically considered what?

A compound

A mixture

An element

A solution

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