Q3 E - Chemistry (OpenStax)

Question

Identify the postulate of Dalton’s theory that is violated by the following observations: 59.95% of one sample of titanium dioxide is titanium; 60.10% of a different sample of titanium dioxide is titanium.

Step-by-Step Solution

Answer

Postulate 4- A compound is made up of atoms from two or more elements that are mixed in a tiny, whole-number ratio. The numbers of atoms of each of a compound's elements are always present in the same ratio.

Step1: Dalton’s atomic theory:

Postulate 1:

Matter is made up of extremely microscopic particles known as atoms. An atom is the smallest unit of an element capable of participating in a chemical reaction.

Step 2: Postulate 2:

An element is made up of only one sort of atom, which has a mass that is unique to the element and is shared by all atoms of that element. A macroscopic sample of an element comprises an enormous number of atoms with identical chemical characteristics.

Step 3: Postulate 3:

Atoms of one element have properties that differ from atoms of all other elements.

Step 4: postulate 5:

During a chemical change, atoms are not generated nor destroyed; rather, they are rearranged to produce substances that differ from those existent before the change.