Evaluating and Solving Logarithmic Functions
In Chemistry, the pH of a substance can be determined using the formula
pH = -log[H+] where H+ is the hydrogen ion concentration of the substance.
Solutions with a pH less than 7 are' said to be acidic and solutions with a pH greater than
7 are basic or alkaline. The table below presents the pH values of some common
substances. Use the pH function to answer the questions that follow.
pH Level Table
Substance
Bleach
PH
Level
13
12
11
10
9
8
7
6
5
4
3
لما
2
1
PH
Soapy Water
Ammonia Solution
Milk of Magnesia
Baking Soda
Sea Water
Distilled Water
Urine
Black Coffee
Tomato Juice
Orange Juice
Lemon Juice
Gastric Acid
-log[H + ]
Determine the hydrogen ion (H+) concentration of
Lemon Juice.
Determine the hydrogen ion (H+) concentration of
Orange Juice.
If the substance has a hydrogen ion concentration of
1.0E-7, it would have the same pH level as
Select an answer