IGCSE BONDING DRY LAB - BEARS AND PENGUINS
THIS LAB CONTENT WILL BE ONLY AVAILABLE DURING CLASS.
YOU NEED TO FINISH THE LAB WITHIN A PERIOD TIME.
In your lab notebook, answer the following questions regarding the picture below:
- Draw the Lewis dot structure for HCl.
- If the penguin represents a hydrogen atom and the polar bear represents a chlorine atom, what does the ice cream represent in the drawing?
- What does the picture try to illustrate?
- Do you think HCl will be attracted to a charged wand?
- Explain question #4
In this lesson you will be exploring polarity and bonding between atoms in greater detail. A comic book will provide new information about these topics and will introduce you to the concept of electronegativity, which helps us to understand partial charges.
Use the comic book called “The Bare Essentials of Polarity” to answer the following questions. (copy questions, highlight them and answer below each)
- How does the comic book define a “polar molecule?”
- Define electronegativity as you understand it, after reading the first two pages of the comic book.
- Interpret the picture at the bottom of page 1. Explain how the iceberg, penguins, and polar bears represent trends in electronegativity.
- What is the artist trying to represent when there are two polar bears arm wrestling together, or two penguins arm wrestling together?
- What three types of bonds are represented on page 3 of the comic book
- What happens to the bonding electrons in each type of bond?
- Explain why there are four scoops of ice cream in the illustration of 02 on page 3.
- What do the six scoops of ice cream represent in the illustration of N2 on page 4?
- Describe what you think is happening to the penguin in the CO2 molecule in the picture on page 4.
- Name three things that the picture of CO2 on page 4 illustrates about the molecule.
- Describe what you think is happening to the penguins in the illustration of H2O on page 4.
- Explain what you think the crossed arrow represents in the comic book.
- what are the two definitions of “dipole” given in the comic book?
- What does electronegativity have to do with polarity?
Using polar bears and penguins, create an illustration showing a hydrogen sulfide molecule, H2S. (Hint: You may wish to start with a Lewis dot structure.)