Lesson 8
CHEMICAL CHANGE
CHEMICAL CHANGE
MINESEC DISTANCE LEARNING
Please be patient, we are assembling your quiz
Score : 0 / 30
1
When a student adds hydrochloric acid (HCl) to a piece of zinc (Zn) metal, hydrogen gas (H2) is evolved, and zinc chloride (ZnCl2) forms. What type of reaction is this and what is the observation?
AI Chat
In this lesson, [01:10] welcomes students to a chemistry session, outlines the topics of energy application, action of heat on substances, physical and chemical changes, and states of matter. It then reviews a previous assignment about air being matter and examples of physical changes, providing correct answers. Then the lesson explains what a chemical change is about a permanent change where a new substance occurs, lists examples from burning wood to photosynthesis, and shows the differences between physical and chemical changes..
DAYAM TCHOKOKAM