Which postulate of dalton atomic theory was able to explain law of definite proportion
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Postulates of Dalton's Atomic theory that " The elements consist of atoms having fixed mass and that number and kind of atoms in a given compound is fixed" came from the law of constant proportion .
For example:
Hydrogen element consist of Hydrogen atom H and Oxygen element consists of oxygen atoms.
It also says that two hydrogen atoms always combine with one oxygen atom to form water molecule .
Since water contains same number of H atoms and Oxygen atoms, each atom having a fixed mass therefore the masses of Hydrogen and Oxygen in water molecule will be in constant proportion..
For example:
Hydrogen element consist of Hydrogen atom H and Oxygen element consists of oxygen atoms.
It also says that two hydrogen atoms always combine with one oxygen atom to form water molecule .
Since water contains same number of H atoms and Oxygen atoms, each atom having a fixed mass therefore the masses of Hydrogen and Oxygen in water molecule will be in constant proportion..
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Dalton's atomic theory were the first modern attempt to describe the behaviour of matter or properties of matter in terms of atoms. This theory was also used to explain the laws of chemical combination in terms of atoms.
The postulates of Dalton's atomic theory that " the elements consists of atoms having sixth mass and that the number and kind of atoms of each element in a given compound is fixed" can be used to explain the law of constant proportions.
The law of constant proportions was given by Proust in 1779.
For e.g
Water is a compound which always consists of the same two elements hydrogen and oxygen combine together in the same constant proportion of 1:8 by mass(1 part by mass of hydrogen and 8 parts by mass of oxygen).
If we decompose 100 grams of pure water by passing electricity through it then 11 grams of hydrogen and 89 grams of oxygen obtained. This experiment shows that water always consists of the same two elements hydrogen and oxygen combine together in the same constant proportion of 11: 89 or 1:8 by mass.
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Hope this will help you...
The postulates of Dalton's atomic theory that " the elements consists of atoms having sixth mass and that the number and kind of atoms of each element in a given compound is fixed" can be used to explain the law of constant proportions.
The law of constant proportions was given by Proust in 1779.
For e.g
Water is a compound which always consists of the same two elements hydrogen and oxygen combine together in the same constant proportion of 1:8 by mass(1 part by mass of hydrogen and 8 parts by mass of oxygen).
If we decompose 100 grams of pure water by passing electricity through it then 11 grams of hydrogen and 89 grams of oxygen obtained. This experiment shows that water always consists of the same two elements hydrogen and oxygen combine together in the same constant proportion of 11: 89 or 1:8 by mass.
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Hope this will help you...
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