Acids
What is the general pH to indicate acid rain?
5.6
What does chlorosis indicate?
Acid deposition in plants
What is the average for the following set of numbers:
10.60 mL
10.61 mL
10.59 mL
10.6 mL
What indicator has a range of 3.6-5.4?
bromocresol green
What substance acts as a buffer in the body?
H2CO3 / HCO3-
Stomach acid
HCl- Hydrochloric Acid
pH>7
Alkaline/basic
Find the concentration of the ethanoic acid vinegar solution:
Vinegar-Ch3COOH (aq)
volume: 10mL
NaOH(aq)
volume: 7.55 mL
concentration: 0.0108 mol/L
C=0.08154 mol/L
pH change from 5.7-3.7
How much has the [H3O(aq)] changed?
increase in [H3O(aq)] by a factor of 100
What is a buffer?
A substance that resists pH change?
What is the equation to calculate [H3O+(aq)]?
10(-pH)
What gases are the main causes of acid deposition?
NOx, SO2
What is the equivalence point?
When there is an equal about of hydrogen and hydroxide in a titration
pH 7- in a titration, the middle of the vertical line on the graph
pH=6.3 [H3O(aq)]=?
5.012 x 10-7 M
What is buffering capacity
Max you can hold WITHOUT a major change in pH
What type of substance donates a hydrogen ion?
An acid
Turns blue litmus red
Acid
What goes into the burette?
Solution with the known concentration
In our lab: Base, NaoH(aq)
[H3O(aq)]=0.0003162 mol/L
pH=?
pH= 3.5
What is bioaccumulation?
Increase in contaminate levels in animals as you go up the foodchain.
What is the conjugate acid of C6H5COO-
C6H5COOH- benzoic acid
Sea water, hand soap, bleach, and oven cleaner are all examples are what?
Basic substances
1000x more concentrated than a pH of 4
What is a pH of 1?
A few drops of methyl orange would turn a solution with a pH of 3.8 into what color?
Orange
What is an abiotic factor? Give two examples.
Nonliving things in an environment