Ph and Water

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Which heats more rapidly ethyl alcohol or water

ethyl alcohol

How many times more basic is a solution with a pH of 9 than a solution with a pH of 8?

10

PH values represent how many changes in ion concentration.

10 fold changes

How many times more basic is a solution with a pH of 10 than a solution with a pH of 8?

100

how many hydrogen bonds can a water molecule form with other water molecules

4 hydrogen bonds

pH after adding acid (water)

5

Initial pH of milk

6

pH after adding acid (milk)

6

pH after adding base (milk)

6

How much water are humans made up of.

60-90%

what is the initial ph of tap water

7

pH after adding base (tap water)

8

0-6

Acidic on the pH scale

What is adhesion?

An attraction between molecules of different substances

What is cohesion?

Attraction between molecules of the same substance

which is more concentrated in low ph H+ or OH-

H+

CO2 + H2o=

H2CO3 (carbonic acid)

Who wrote The fitness of the enviroment

Henderson

7

Is neutral/water

Solutions with more (H+) are what?

More acidic

Solutions with less (H+) are...?

More basic

Are the reactive qualities of ammomia due to an excess of H+ or OH-

OH-

Which is more concentrated in a low pH solution H+ (hydrgen ion) or OH- (hydroxl ion)

OH- hydroxly ion

palm springs is almost directly inland from Santa Monica, which of these places has more water nearby and in the air.

Santa Monica

What is a hydroxyl ion?

equal concentration in pure water. Decreases in acid and increases in bases.

What is created when carbon dioxide and water are mixed?

a weak acid, aka carbonic acid

what has a lower boiling point.

alchohol

Which cools more rapidly

alcohol

which heats up faster

alcohol

8-14

basic

Do soaps and cleaners tend to me acidic or basic.

basic

is a solution with a "high" ph acidic or basic?

basic

is a solution with a high pH acidic or basic?

basic

Did the milk buffer 1. acid 2. base or both?

both

Define polar

can dissolve in water, hydrophobic

would you conclude that the ph of soda is strongly influenced by?

carbonation

define evaporate

change from liquid to gas.

define adhesion

charged poles of water molecules bonding with other substances that are charged. Allows for water molecules to hold other molecules and ions.

mosquitoes can walk on water because of adhesion or cohesion

cohesion

Define nonpolar

doesn't like water, hydrophilic

should a humid or dry night get colder?

dry

Adsorption

enables water too "wet" other substances.

are substance with high specific heat harder or easier to heat up than those with low specific heat

harder

define buffers

have the ability to resist pH change by chemically incorporating excess H+ (hydrogen ions) or donating H+ when it is depleted. blood and milk contain natural buffer systems

define specific heat

he amount of heat necessary to raise the temperature of one gram of that substance one degree centigrade.

assuming organisms function best if their internal temperatures remain relatively constant as outside temperatures change, would a body fluid with a high or low specific heat be best?

high

to regulate body temp would it be better to have a body fluid with a high or low specific heat?

high

What is the measure of a PH of a solution?

hydrogen ion (H+).

why does water evaporate slowly

it requires a great deal of heat

is water acid or base

neither

would you conclude that the ph of fruit juice is strongly influenced by?

neither

Did the H+ concentration of fresh soda pop and flat soda pop differ by a magnitude of 10 times or greater?

no

why are water molecules polar

one end is negatively charged due to the oxygen atom and the other end is postively charged due to the hydrogen atoms

Palm springs or santa monica experiences both hotter and colder temperatures?

palm springs

Example of 10 fold changes

ph of 2 is ten times more (H+) then a ph 3 solution and 100 times more then a (H+) than a solution with a pH of 4.

Is water polar or non-polar?

polar

define cohesion

the ability of water molecules to bond to each other (because they are polar)

define the heat of vaporization

the amount of heat necessary to cause a liquid to evaporate (liquid to gas)

Define specific heat

the heat required to raise the temperature of the unit mass of a given substance by a given amount

Which has the higher specific heat water or alcohol?

water

which has a higher specific heat ethyl alcohol or water

water

define surface tension

when cohesion allows water molecules to form an almost membrane-like outer layers

define capillary action

when water is drawn up by small tubes with diameters, involves forces known as cohesion and adhesion

Which has more hydrogen ions wine or water

wine

Did the H+ concentration of diet soda and regular soda differ by magnitude of 10 times or greater?

yes

Did the H+ concentration of pure water and sugar water differ by a magnitude of 10 times or greater?

yes

Did your experimental results agree with the fact that milk is a pH buffer?

yes

If your blood and tissue fluid were alcohol instead of water , would you be more likely to get overheated on a hot day?

yes

Vinegar is an acetic acid solution. Does it's ph agree?

yes

is water an efficient evaporative cooler. If so, why?

yes, it has a high heat of vaporatation so it can absorb a lot of heat before it evaporates


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