Chemistry Note Year 7 D, Week 11 Hazards
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This document is a chemistry note for year 7. It provides information on hazards, including the properties of acids and alkalis and their potential harm. It also includes homework related to the topic.
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**Chemistry Note for year 7 D, Week-11** Topic: Hazards Hazard means something that can cause harm. There are hazard symbols in chemistry. 1. Acids and alkali are hazardous. They can be found in homes. 2. They are corrosive, means can attack skin or metals or stones. 3. They can cause perman...
**Chemistry Note for year 7 D, Week-11** Topic: Hazards Hazard means something that can cause harm. There are hazard symbols in chemistry. 1. Acids and alkali are hazardous. They can be found in homes. 2. They are corrosive, means can attack skin or metals or stones. 3. They can cause permanent damage on human tissue. Example, acid spilled on hand causes permanent damage. Drain cleaner is corrosive alkali. Dilute hydrochloric acid can be irritant, cause skin inflammation, but the concentrated acid is corrosive. 4. Many drinks contain natural and artificial acids. Many sour-tasting fruits such as lemons contain citric acid. All fizzy drinks are also acidic. Homework Prepare international hazard symbols. You can print or draw.
