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 a _____; > 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