Class 7 Exam  >  Class 7 Notes  >  Science Class 7  >  PPT - Acids, Bases & Salts

Acids, Bases & Salts Class 7 PPT

Download, print and study this document offline
Please wait while the PDF view is loading
 Page 1


Acids, Bases
& Salts
C L A S S - 7
Page 2


Acids, Bases
& Salts
C L A S S - 7
Acids and Bases
Many substances that you encounter in your
daily life have different properties.
Substances have either acidic, basic or
neutral properties.
Page 3


Acids, Bases
& Salts
C L A S S - 7
Acids and Bases
Many substances that you encounter in your
daily life have different properties.
Substances have either acidic, basic or
neutral properties.
Acids are substances that taste sour and
include natural acids found in items like
curd, vinegar, lemon, and orange juice. They
exhibit acidic properties.
Bases are substances that taste bitter, feel
slippery to the touch, and include items like
baking soda and milk of magnesia.
Acids and Bases
Page 4


Acids, Bases
& Salts
C L A S S - 7
Acids and Bases
Many substances that you encounter in your
daily life have different properties.
Substances have either acidic, basic or
neutral properties.
Acids are substances that taste sour and
include natural acids found in items like
curd, vinegar, lemon, and orange juice. They
exhibit acidic properties.
Bases are substances that taste bitter, feel
slippery to the touch, and include items like
baking soda and milk of magnesia.
Acids and Bases
Indicators are special substances
used to determine if something is
acidic or basic. These substances
change color when added to an
acidic or basic solution. Some
natural indicators include litmus,
turmeric, and china rose petals.
Indicators
Page 5


Acids, Bases
& Salts
C L A S S - 7
Acids and Bases
Many substances that you encounter in your
daily life have different properties.
Substances have either acidic, basic or
neutral properties.
Acids are substances that taste sour and
include natural acids found in items like
curd, vinegar, lemon, and orange juice. They
exhibit acidic properties.
Bases are substances that taste bitter, feel
slippery to the touch, and include items like
baking soda and milk of magnesia.
Acids and Bases
Indicators are special substances
used to determine if something is
acidic or basic. These substances
change color when added to an
acidic or basic solution. Some
natural indicators include litmus,
turmeric, and china rose petals.
Indicators
1.Litmus: A common natural indicator
extracted from lichens. Litmus is purple in
a neutral solution, red in an acidic
solution, and blue in a basic solution. For
instance, when lemon juice is added to
red litmus, it remains red, indicating its
acidic nature. Blue litmus turns red in the
presence of acids.
Natural Indicators
Read More
111 videos|246 docs|28 tests

Top Courses for Class 7

FAQs on Acids, Bases & Salts Class 7 PPT

1. What is an acid?
Ans. An acid is a substance that donates protons (H+) when dissolved in water, resulting in an increase in the concentration of hydrogen ions. Acids have a pH less than 7 and can react with metals, turn blue litmus paper red, and have a sour taste.
2. What is a base?
Ans. A base is a substance that accepts protons (H+) or donates hydroxide ions (OH-) when dissolved in water, resulting in a decrease in the concentration of hydrogen ions. Bases have a pH greater than 7 and can react with acids, turn red litmus paper blue, and have a bitter taste.
3. What are the properties of salts?
Ans. Salts are compounds formed by the reaction of an acid with a base. They are ionic compounds that consist of a cation (from the base) and an anion (from the acid). Salts are generally solid at room temperature, have high melting and boiling points, and can conduct electricity when dissolved in water.
4. How do acids and bases react with each other?
Ans. Acids and bases can neutralize each other through a chemical reaction called neutralization. In this reaction, the acid donates protons (H+) to the base, forming water and a salt. The pH of the resulting solution depends on the strength of the acid and base used.
5. What are some common examples of acids, bases, and salts?
Ans. Some common examples of acids include vinegar (acetic acid), lemon juice (citric acid), and hydrochloric acid. Examples of bases include baking soda (sodium bicarbonate), ammonia, and sodium hydroxide. Common salts include table salt (sodium chloride), Epsom salt (magnesium sulfate), and calcium carbonate.
111 videos|246 docs|28 tests
Download as PDF
Explore Courses for Class 7 exam

Top Courses for Class 7

Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Related Searches

Bases & Salts Class 7 PPT

,

shortcuts and tricks

,

Free

,

Bases & Salts Class 7 PPT

,

Exam

,

practice quizzes

,

study material

,

Previous Year Questions with Solutions

,

Acids

,

pdf

,

ppt

,

mock tests for examination

,

Acids

,

video lectures

,

Summary

,

Semester Notes

,

Important questions

,

past year papers

,

Bases & Salts Class 7 PPT

,

Acids

,

Extra Questions

,

Sample Paper

,

Objective type Questions

,

MCQs

,

Viva Questions

;