1.1 Chemistry in Living Systems (CQ - Exam) Flashcards
1
Q
Explain how a polar covalent bond is different from an ionic bond.
A
Polar covalent bonds are unequal sharing of electrons in a covalent bond.
Ionic bonds is the complete transfer of one or more valence electrons.
2
Q
What is the hydrophobic effect?
A
The hydrophobic effect is the natural clumping together of nonpolar molecules in water.
3
Q
How to know if bonds are polar or non-polar
A
- Nonpolar bonds will have both equal electronegativity
- polar bonds each have different electronegativity because the electrons will be more attracted to one side of the bond than the other
4
Q
Use the hydrophobic effect to explain why the oil in salad dressing will rise to the top of a water-based mixture of vinegar and herbs.
A
Oil is hydrophobic due to its molecules being nonpolar so it clumps together when in water
