Law of Multiple Proportions (1803)

• The Law of Multiple Proportions, established by John Dalton in 1803, states that when two elements form more than one compound, the masses of one element that combine with a fixed mass of the other are in ratios of small whole numbers.

• Dalton's experiments with various combinations of elements, particularly those forming multiple compounds, revealed that the ratio of masses of one element combining with a fixed mass of another element was often in simple integer ratios.

• This law provided further evidence for the atomic theory by suggesting that elements could combine in different proportions to form distinct compounds, supporting the notion of discrete, indivisible atoms.

• The Law of Multiple Proportions strengthened the understanding of the composition of compounds and contributed to the development of atomic mass determination, ultimately solidifying the foundation of modern stoichiometry and the atomic theory of matter.

Mass Ratio Calculation

• The method of calculating the mass ratio between elements in a compound, helping understand the quantitative aspect of chemical combinations.

• Mass ratio calculation is a method used to determine the relative masses of elements in a compound or reaction.

• It involves finding the ratio of the masses of the elements involved in a chemical reaction or compound, usually expressed as a simple numerical relationship.

• The process of mass ratio calculation is essential for understanding the quantitative aspects of chemical reactions and for determining the proportions of elements in compounds.

• This calculation method serves as a fundamental tool in stoichiometry, enabling chemists to analyze and predict the outcomes of chemical reactions based on the masses of the substances involved.