Question
Download Solution PDFWho gave the 'Law of multiple proportions'?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is John Dalton.
Key Points
- This law of multiple proportions is also known as Dalton's law because this law was announced (1803) by the English chemist John Dalton.
- Law of multiple proportions:
- if two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers.
- Hydrogen combines with oxygen to form two compounds, water and hydrogen peroxide.
Hydrogen + Oxygen → Water
2g 16g 18g
Hydrogen + Oxygen → Hydrogen Peroxide
2g 32g 34g - Masses of oxygen is16 g (in water) and 32 g (in hydrogen peroxide) combine with 2g of hydrogen, bear a simple ratio, 16:32 or 1: 2.
Additional Information
- Avogadro's Law: Equal volumes of all gases at the same temperature and pressure should contain the equal number of molecules.
- Gay Lussac's law of gaseous volume: The gases combine in a simple ratio by volume, when they are kept at constant temperature and pressure.
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