Unit 2: Water Properties Part 2 Flashcards Preview

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Flashcards in Unit 2: Water Properties Part 2 Deck (28):
1

Water is called the ___________ _________.

universal solvent

2

Liquid that is doing the dissolving of another substance

solvent

3

Substance being dissolved in the solvent

solute

4

Substance possessing equal distribution of material. (Kool-aid is a good example.)

solution

5

__________ ________ of _______ make solvent, solute, and solutions possible.

hydrogen bonds, water

6

Water surrounding a molecule. Substance is dissolved and “disappears”.

hydration shell

7

Oils, grease, and fat are ___-_____ and therefore water can’t grab and dissolve. (Need salt to make a molecular bridge to dissolve… most dishwashing liquids are just saltwater with coloring.)

non-polar

8

Water cannot attach to the substance because the substance is non-polar.
The substance “hates” water’s polarity.

Hydrophobic

9

means water

hydro

10

means fear of

phobic

11

means love of

philic

12

Water can attach to the substance because the substance is polar.
The substance “loves” water’s polarity.

Hydrophilic

13

Refers to water breaking apart into H+ (Proton) and an OH- (Hydroxide Ion).

Dissociation

14

a substance that gives away H+. (Measured on a pH scale.)

acid

15

the ph scale goes from ___ to ___

0, 14

16

What is neutral on the ph scale?

7

17

7 – Substance is a ____

acid, base

18

a substance that gives away OH-. (Measured on a pOH scale.)

base

19

On the pOH scale: 7 – substance is an _____

base, acid

20

A substance that can resist changes in pH or pOH.

buffer

21

It can take on or gives off a H+ or OH- to maintain the pH or pOH concentration

buffer

22

_______ helps keeps blood at a pH of 7.4 ideally

Bicarbonate

23

Example of buffer

Bicarbonate in human blood HCO₃¯

24

Why is bicarbonate needed?

because of the food, drink, air or other substances we put into our bodies

25

HCO3- can take on H+ from the blood to become H2CO3 (_______ ______) to raise blood pH. The H2CO3 then travels to the lungs where it is converted to H2O (water) and CO2.

carbonic acid

26

Refers to Rain, Snow, Sleet, Ice, or Fog with a low pH.

acid precipitation

27

Water falling in the environment that has a pH of less than 5.6.

acid precipitation

28

Acid precipitation is mainly caused by SO (____ _____) and NO (_____ ______) in the air to combine with water.
Both are found in fossil fuels when burned. (Such as oil, gasoline, or diesel fuel.)

Sulfur Oxide, Nitrous Oxide