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ph an Water notes

pH and the Properties of Water

QuestionAnswer
pH stands for: potential of hydrogen H₂O
What does pH measure? how acidic or alkaline a substance is
pH from 0->6 acids
pH from 8-14 bases
pH of 7 neutral (water)
substance that changes color in the presence of an acid or base indicator
changes from colorless to magenta in the presence of a base phenolphthalein
turns red in an acid (ph <5), turns blue in a base (pH >8) litmus paper
use a probe inserted into the liquid to accurately measure pH values pH meters
the difference in H+ ions between pH3 and pH4 10x
hydrogen ions H+
taste sour acids
vinegar, citrus fruits, grapes, apples are examples of acids
acetic acid vinegar
tartaric acid grapes
malic acid apples
pH below 7 acids
pH above 7 bases or alkalis
slippery to the touch bases or alkalis
bitter tasting bases or alkalis
sea water, soaps, ammonia, bleach, and oven cleaner are examples of bases or alkalis
blood pH 7.4
when the blood pH reaches 6.95 what happens nervous system unresponsive, coma, and soon death
when the blood pH reaches 7.7 what happens nervous system become overactive and muscle spasms and convulsions occur
polar molecule water
regions of + and - charge water
universal solvent water
liquid, solid, or gas that dissolves a solute (a chemically different liquid, solid or gas), resulting in a solution. solvent
force of attraction between like molecules cohesion
hydrogen bonds between water molecules is an example of cohesion
what explains surface tension cohesion
what is an example of surface tension water beading up on a newly waxed car
contractive tendency of the surface of a liquid that allows it to resist an external force surface tension
force of attraction between unlike molecules adhesion
water adhering to another surface is an example of adhesion
water's unique ability to "climb" a narrow tube capillary action
what is based on both cohesion AND adhesion capillary action
Why is water neutral on the pH scale balance of H+ and OH-
mixes well with water hydrophilic
stays together and does not mix well with water hydrophobic
water is a ___________ molecule polar
Created by: serverge
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