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Questions and Answers
What does it mean when a molecule is said to be "polar"?
What does it mean when a molecule is said to be "polar"?
It means that it has an unevenly distributed electrical charge.
How do hydrogen bonds between water molecules form?
How do hydrogen bonds between water molecules form?
They form because of their partial negative and positive charges.
Use the structure of a water molecule to explain why it is polar.
Use the structure of a water molecule to explain why it is polar.
A water molecule is polar because the electric charge is distributed unevenly; the oxygen atom is on one end, causing it to have a slight negative and a slight positive charge.
Why is water such a good solvent?
Why is water such a good solvent?
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What is the difference between a solution and a suspension?
What is the difference between a solution and a suspension?
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What is an acid? What is a base?
What is an acid? What is a base?
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If the acid hydrogen fluoride (HF) is dissolved in pure water, will the pH of the solution be greater or less than 7?
If the acid hydrogen fluoride (HF) is dissolved in pure water, will the pH of the solution be greater or less than 7?
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During exercise, many chemical changes occur in the body, including a drop in blood pH which can be very serious. How is the body able to cope with such changes?
During exercise, many chemical changes occur in the body, including a drop in blood pH which can be very serious. How is the body able to cope with such changes?
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Study Notes
Polar Molecules
- A polar molecule has an uneven distribution of electrical charges, resulting in partial positive and negative regions.
Hydrogen Bonds in Water
- Hydrogen bonds form between water molecules due to the partial negative charge of oxygen and the partial positive charge of hydrogen atoms.
Structure of Water
- The polarity of a water molecule arises from its bent shape, with the oxygen atom having a slight negative charge and the hydrogen atoms having slight positive charges.
Water as a Solvent
- Water's polarity makes it an excellent solvent, capable of dissolving ions and other polar molecules.
Solutions vs. Suspensions
- A solution features components evenly distributed throughout, while a suspension contains particles that do not remain evenly mixed.
Acids and Bases
- An acid produces hydrogen ions (H+) in solution with a pH of less than 7, while a base generates hydroxide ions (OH-) and has a pH greater than 7.
pH of Hydrogen Fluoride in Water
- Dissolving hydrogen fluoride (HF) in water results in a pH less than 7 due to the formation of hydronium ions.
Blood pH Regulation During Exercise
- The body combats drops in blood pH during exercise by releasing weak acids to prevent excessive alkalinity, maintaining pH balance.
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Description
Test your knowledge on polar molecules and hydrogen bonds in this Chemistry Section 2.2 Flashcards quiz. Explore the characteristics of water and its molecular structure to understand polarity and hydrogen bonding. Perfect for students looking to reinforce their understanding of molecular chemistry concepts.
