5 Written questions
5 Matching questions
- Draw functional group structure and give molecular formula for: Carboxyl.
- What two properties of water do plants take advantage of, to move water against gravity, explain?
- Draw functional group structure and give molecular formula for: Hydroxyl.
- Describe the terms: solvent, solute, and solution.
- What is the pH scale?
- a Cohesion and Adhesion.
Cohesion - waters ability to stick to ITSELF (other water molecules)
Adhesion - waters ability to stick to OTHER THINGS that are POLAR
- b pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution
- c Carboxyl (-COOH) acidic properties, components of many biologically important molecules; C double bonded to O and single to OH
Ex: Formic acid or acetic acid
- d Solvent: Substance doing the dissolving (water)
Solute: Substance being dissolved (sugar or salt)
Solution: homogenous mixture (product of solvent & solute)
- e Hydroxyl (polar, form hydrogen bonds, polar solvents)
−OH (may be written HO-)
Ex: Alcohols, such as Ethanol
5 Multiple choice questions
- Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)
- 4 and 4
- H⁺ = 10⁻⁷ and OH⁻ = 10⁻⁷ Equation: [H⁺][ OH⁻] = 10⁻¹⁴ (always = to 14)
- 1.) Structural - changes structural form; same formula, different structure
2.) Geometric - differ in spatial arrangement due to inflexibility of double bond (two types: cis and trans) 3.) Enantiomers - mirror images of each other
5 True/False questions
How does waters specific heat compare to other solvents specific heat? What properties does it have that allows this? What affect does this have on the climate? → Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)
Does form impact function? → YES!
Describe surface tension and give an example relating to living organisms. → Hydrogen bonds in water hold each other together stronger than they'd bond to the air, for example. Ex: Jesus Christ lizard can walk on water because of it's surface tension; a dragonfly has non-polar exoskeleton so water beads on it
What are the differences between a hydrophilic and hydrophobic substance? → Hydrophilic - attracted to water; polar or ionic; has charge
Hydrophobic - repels water; nonpolar; no charge
Draw functional group structure and give molecular formula for: Phosphate.
Example? → Phosphate (−OPO₃²⁻) (acid: DNA, cell membrane, ATP); P double to O, single to O, 2 O⁻
Ex: glycerol phosphate