5 Written questions
5 Matching questions
- Do the functional groups have an impact on life? Give an example.
- What two properties of water do plants take advantage of, to move water against gravity, explain?
- What are emergent properties of water?
- Describe the terms: solvent, solute, and solution.
- Be able to calculate the molar concentrations of hydrogen and hydroxide ions from a given pH value or vice versa.
- a Yes. Ex: tiny tag from a functional group determines whether we are males or females
- b Solvent: Substance doing the dissolving (water)
Solute: Substance being dissolved (sugar or salt)
Solution: homogenous mixture (product of solvent & solute)
- c Ex: pH = 12, What is the molar concentration of H⁺? OH⁻? H⁺ is 1 x 10⁻¹², OH⁻ is 1 x 10⁻².
- d Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)
- e Cohesion and Adhesion.
Cohesion - waters ability to stick to ITSELF (other water molecules)
Adhesion - waters ability to stick to OTHER THINGS that are POLAR
5 Multiple choice questions
- A log scale. Each change is 10 times. So when we go up or down, we add a zero to the end.
- Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
- Heat required to convert 1g of liquid into a gaseous state (high); Evaporative cooling is the warmest molecules of a liquid leave as a gas; allows us to sweat, or release heat so we don't die
(see p. 1 slide 4 in ch. 3)
5 True/False questions
What are primary producers? → Fix C from atmospheric CO₂ (ex: Plants w/ photosynthesis)
Why is carbon the basic building element of life? → WATER!
What is a buffer? → A log scale. Each change is 10 times. So when we go up or down, we add a zero to the end.
What is a hydrocarbon? Polar or non-polar? → Organic molecules composed solely of Carbon and Hydrogen; Nonpolar covalent bond so they resist/repel water (ex: fat)
What is the Universal Solvent? → WATER!