CHAPTER 5 –
ACID BASES AND SALTS
DRAW THE PH SCALE
LEARNING OBJECTIVES:
To explain acids, bases, and salts and their general properties.
Understand some uses, of acids, bases, and salts.
Learn how to determine the acidity or basicity of a substance using
natural and universal indicators.
Know how are salt formed.
, Analyze neutralization reaction and its daily life applications.
SCIENCE WORDS:
o Organic acid
o Inorganic acid
o Mineral acids
o Indicators
o Litmus paper
o Phenolphthalein
o Methyl orange
o Dilute and concentrated
o Bases
o Lichen
o Indigestion
VERY SHORT ANSWER QUESTIONS:
1) How does litmus indicator work?
Ans) light blue litmus paper turning red under acidic conditions and
red litmus paper turning blue under basic or alkaline conditions.
2) Why should factory waste be neutralized before discharging it into
water bodies
Ans) Because harm aquatic lives
3) what is the use of putting lime in paan when it is tasteless
a) Enhances Flavor: While lime itself is relatively tasteless, it acts as a
catalyst to enhance the flavors of other ingredients in the paan
b) Release of Alkaloids: Lime helps in the release of alkaloids from
the betel nut.
ACID BASES AND SALTS
DRAW THE PH SCALE
LEARNING OBJECTIVES:
To explain acids, bases, and salts and their general properties.
Understand some uses, of acids, bases, and salts.
Learn how to determine the acidity or basicity of a substance using
natural and universal indicators.
Know how are salt formed.
, Analyze neutralization reaction and its daily life applications.
SCIENCE WORDS:
o Organic acid
o Inorganic acid
o Mineral acids
o Indicators
o Litmus paper
o Phenolphthalein
o Methyl orange
o Dilute and concentrated
o Bases
o Lichen
o Indigestion
VERY SHORT ANSWER QUESTIONS:
1) How does litmus indicator work?
Ans) light blue litmus paper turning red under acidic conditions and
red litmus paper turning blue under basic or alkaline conditions.
2) Why should factory waste be neutralized before discharging it into
water bodies
Ans) Because harm aquatic lives
3) what is the use of putting lime in paan when it is tasteless
a) Enhances Flavor: While lime itself is relatively tasteless, it acts as a
catalyst to enhance the flavors of other ingredients in the paan
b) Release of Alkaloids: Lime helps in the release of alkaloids from
the betel nut.
