Part 1 Hard Chemistry Questions Paper 1: Chemistry Edexcel IGCSE

The substance being dissolved

The mixture formed when a solute dissolves in a solvent

The liquid that something is dissolved into

A solution where the maximum amount/concentration of solute has been dissolved, so no more solute will dissolve in the solution

The visual output of a chromatography run

A substance will separate during chromatography if it is a...

• mixture

• compound

• element

• molecule

Rf Value =

• Distance travelled by substance/

  distance travelled by solvent

• Distance travelled by solvent/

  distance travelled by substance

• Distance travelled by solute/distance travelled by solvent

• (Distance travelled by solute/distance travelled by substance) x 100

What are the pure substances run next to the mixture in a chromatography experiment to identify the components?

The closer the Rf value is to 1...

• The more soluble that component is in the solvent

• The less soluble that component is in the solvent

The smallest particle of an element that consists of electrons surrounding a nucleus that contains protons and neutrons