According to the 7th grade science book I teach out of - a pure substance can only be an element or a compound. Tomato Juice is a mixture of tomato solids and water. It cannot therefore be a pure substance using "science language".
However, if I use tomato juice to make chili for example, I certainly want it to be "pure" tomato juice, if you know what I mean.
Ketchup is not considered to be a neutral substance. Ketchup is considered to be an acidic substance with a low pH.
pure substance, propanone
Pure substance
it is a pure substance.... not
Methane is a pure substance.
A pure substance is the same throughout. When a substance is 100% something it is pure.
Helium is pure as it is on the periodic table.
silicon is a pure substance because it is an element and as we know an element is a pure substance
Silicon is an element. Its symbol is Si.
Ketchup is a mixture.
pure substance
Pure Substance