Acid
What is Acid rain?
• Acid rain, or acid deposition, is a broad term
that includes any form of precipitation with
acidic components, such as sulfuric or nitric
acid that fall to the ground from the
atmosphere in wet or dry forms. This can
include rain, snow, fog, hail or even dust that
is acidic.
What cause acid rain?
• Acid rain results when sulfur dioxide (SO2) and
nitrogen oxides (NOX) are emitted into the
atmosphere and transported by wind and air
currents. The SO2 and NOX react with water,
oxygen and other chemicals to form sulfuric
and nitric acids. These then mix with water
and other materials before falling to the
ground.
Acid rain
• Acid rain
• Acid rain is a pollution problem caused by the
release of acidic gases into the atmosphere. It
contributes to pollution in a variety of ways
including:
• damage to plants and the wildlife
• erosion of limestone buildings/structures
• corrosion (rusting) of iron bridges/structures
Acidic soil
• Soil acidity (and acidity of anything else, for that
matter) is measured on a scale of 1 to 14.
• Everything below 7 is considered to be acidic.
• Everything above is considered to be alkaline.
• Most garden plants thrive at a pH between 6 and
7.5. The reason a pH between 6 and 7.5 is
optimal for garden plants is that between 6 and
7.5, phosphorus in the soil is soluble—meaning
that it dissolves in water and is taken up by plant
roots.
What Causes Acidic Soil?
• Is that the organic matter and minerals that break
down in soil over time are acidic in nature, and make
the soil acidic. This is common in pine forests and peat
bogs.
• The second way soil becomes acidic is via leaching due
to excessive rainfall or irrigation. Too much water
results in key nutrients, such as potassium, magnesium,
and calcium, being washed out (leached) from the soil.
These elements all prevent soil from being acidic, so
when they're leached out, the pH level of the soil starts
to drop, resulting in acidic soil.
Milk turns sour
Why the milk tastes sour?
• This is because its sugar (lactose)has turned
into acid (lactic acid)