Topic 3: Acids, Bases and pH Flashcards
1
Q
Acids
A
- Substance with a pH of less than 7
- Tastes sour
- Causes burning sensation in muscles
Ex. car battery
2
Q
Basic/Alkaline
A
- Substance with a pH greater than 7
- Bitter
- Feels slippery
Ex. drain cleaner
3
Q
Neutral
A
- Substance with an pH of 7
Ex. water
4
Q
Chemical Indicator/ Acid and Base Indicator
A
- Reacts with substance to show whether substance is an acid or a base
Ex. litmus paper
5
Q
Litmus Paper
A
- Mixture of plant compounds from lichen
- Turns red when reacting with an acid
- Turns blue when reacting with a base
- Stays the same if substance is neutral
6
Q
pH Scale
A
- Quantitative scale that indicates how basic or alkaline a substance is using numbers
- pH below 7 is acidic, pH above seven is basic/alkaline, pH of seven is neutral
- Stands for power of hydrogen
- 10
7
Q
Ph Paper
A
- Paper that shows an unique color for each level of pH
- Used to measure level of acidity or basicity
8
Q
Antacid
A
- Mild base that reacts with acids in stomach to neutralize it
9
Q
Neutralization
A
- When an base or acid is added to another base or acid to neutralize it
- Reaction produces water and salt
10
Q
Acid Precipitation
A
- When carbon, sulfur and nitrogen oxides react with water in the atmosphere
11
Q
What are the 4 types of acid precipitation?
A
- Sulphureous acid
- Sulfuric acid
- Nitrous acid/nitric acid
- Carbonic acid
12
Q
Why is acid snow more harmful than acid rain?
A
- stays longer and accumulates
- runs into our ground and fresh water systems
13
Q
How does acid precipitation effect soil?
A
- Acids dissolve minerals in soil resulting in poor growing conditions
14
Q
Liming
A
- When acidic lakes are treated with lime (calcium hydroxide) to neutralize them
- Temporary solution to acid precipitation
15
Q
Catalyst
A
- Substance that speeds up a chemical reaction without being used up in the reaction
