Question

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white precipitate is forcd. It is because silver nitrate robots chemically
Core Science - Chemistry-IX
THREE
1
Goliat nuk
NSIDE THE CHAPTER
Pour about 20 ml of the solution or silver
nitrate in r clean conical flak
Take an ignition tuba and to its noek, tlo to
Sonor lutves oor
Frydrochlorio cd
Z
Sivertirate
Fla. 3.1. Apparatus for the experin
voritication of law of conservations
compounds
where thereil, Or
CentroyerLir
(A) Law of Conan at Mass
Accordin to this law.) 3
heemren reen Tx Timis no kona
Atoms and Molecules
, and mic their tonicity
long threa, Finlr il the ignition tube with conc. hydrochloric acid. Carefull
ignition tubo in the conical flask, tuking care that its contents do not spill
nitrato solution. Fix rubber cork in the inouth of the canicul lark, so the
tubo remains suspended ubove the silver nitrato solution.
3. Find mass of the conical flask by in physical bulance and record it.
4. Now tilt the conical flask so that the contents within il mix. You will not
Find the mass of the conical flask again and record it. You will notic
change in the mass, thereby proving the law of conservation of mass.
In the above experiment Lavoisier demonstrated the importance of care
mass, which led to the discovery of another law, the Law of Constant Pro
it of matter, viz. "anu" and "paramanu", was put forth by Maharishi
-1794) and Joseph L. Proust established two important laws
CHAPTER
Shaws or chemical combination Dalton's atomic theory
Molecular formula of atoms and molecules Slons and radicals
Valency and its kinds and walency of ions and radicals
To write chemical formula or ionic compounds
To write chemical formula of molecular e
Molecular mass and unit formula mass and their calculation
Sram molecular mass and unit formula mass
"umerical problems on molecular mass
ple concept, its need and relation between gram-molecular mass.
a number numerical problems on mole concept
3.1 ATOMIC THEORY OF
MATTER
atter.
Combination
BYLaw
chloride solution.
said that these particles ndanally
exist in combined form, which
osopher, also proposed that matter is made up of extremely small
me comes from Greek language and means indivisible".
This
experiment can be performed by using following solutions:
(i) Copper sulphate solution and sodium carbonate solution.
(ii) Barium chloride solution and sodium sulphate solution.
(iii) Lead nitrate solution and sodjum
Law of (Constant Proportions or Law of Definite proporti
It states in a pure chemical substance, same elements are alw
proportion by mass.
Explanation :
From the above law, it is clear that if a pure chemical comp
more different methods, then all the pure samples of chemical com
(i) Same elements in their composition.
(ii) The ratio of elements by weight is a constant quantity.
Examples :
Pure samples of the compound magnesium oxide can be ob
as follows:
(i) By burning magnesium ribbon in air.
Magnesium + Oxygen
Core Science Chemistry-IX
zical sciences. These laws are discussed as follows:
hcat
Magnesium oxide​

Answer 1

Answer:

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