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23 terms

Lab semester 1 review

measurement, acids and bases, macromolecules, enzymes, microscope, the cell, osmosis and diffusion,
STUDY
PLAY
what is the Meniscus?
concave surface of a liquid resulting from surface tension
where do you measure volume of a liquid?
bottom of meniscus
convert 123,000 to scientific notation
1.23 x 10^5
formula to convert F to C
1.8(*C) + 32
formula to convert C to F
(*F-32) / 1.8
basic units for length, mass and volume
meter, gram, liter
Formula to find area of a box
L x W x H
Define Acid
Substance that dissociates when dissolved in water
Define Base
substance the reduces hydrogen ion concentration when dissolved in water
Define pH
measure of power of the hydrogen ion concentration in a solution.
what id pH neutral?
7
Define Anthocyanins
plant pigment used as pH indicator
Ex: red cabbage extract
Define Buffer
special solutions that help maintain pH by resisting changes.
3 ways to measure pH
pH meter, Anthocyanin indicators, pH paper
Know pH level with matching color
pH 2 = red
pH 3 = pink
pH 5 = violet
pH 7 = purple
pH 8 = blue
pH 12 = green
Which antacid neutralized acid best?
alka-selzer
Define Colorimetry
Chemicals used to test for presence of marcomolecules
Define oxidation
interaction between oxygen molecules and other substances
What is Sudan IV?
used to test for lipids. Red stain
Define Emulsion
Mix of 2 or more liquids that are normally unblendable
Define Emulsifier
Stabilizes an emulsion by increasing it's kinetic energy
Define Hydrolysis
Bonds between monomers broken down by addition of water
EX: Digestion
Difference between polar and non polar
polar like water (Hydrophillic)
non-polar doesn't like water (Hydrophobic)