5 Written Questions
5 Matching Questions
- What is heat of vaporization? How does it relate to evaporative cooling? What affect does it have on living organisms?
- What is a hydrocarbon? Polar or non-polar?
- What is the pH scale?
- What are functional groups? Names?
- What are emergent properties of water?
- a 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
- b Organic molecules composed solely of Carbon and Hydrogen; Nonpolar covalent bond so they resist/repel water (ex: fat)
- c Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)
- d Small organic molecules with great effects:
Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
- e pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution
5 Multiple Choice Questions
- Acids raise the concentration of H⁺ ions in an aqueous solution (decreases the pH number)
Bases lower the concentration of H⁺ ions (increases the pH number)
- Because it can bond to 4 other atoms (tetravalent - 4 valence electrons)
- Carbon and Hydrogen
- Waters specific heat is much higher that that of other solvents; this is because of hydrogen bonding; this keeps temperatures of places near/on bodies of water consistent
- Fix C from atmospheric CO₂ (ex: Plants w/ photosynthesis)
5 True/False Questions
Know functional group NAMES, MOLECULAR FORMULAS, and STRUCTURES! → Yes. Ex: tiny tag from a functional group determines whether we are males or females
How many valence electrons does carbon have? How many single covalent bonds can it form? → Because it can bond to 4 other atoms (tetravalent - 4 valence electrons)
Be able to calculate the molar concentrations of hydrogen and hydroxide ions from a given pH value or vice versa. → Ex: pH = 12, What is the molar concentration of H⁺? OH⁻? H⁺ is 1 x 10⁻¹², OH⁻ is 1 x 10⁻².
What is specific heat? → pH is the measurement used to quantify the H⁺ ion concentration in an aqueous (water) solution
What are the molar concentrations of hydrogen and hydroxide ions in one liter of pure water? → Ex: pH = 12, What is the molar concentration of H⁺? OH⁻? H⁺ is 1 x 10⁻¹², OH⁻ is 1 x 10⁻².