This simulation shows two representations of a ternary phase diagram, which is used to represent the phase behavior of three-component mixtures. Move the black dot to any location within the triangle by dragging it with your mouse. The black dot represents the overall composition of the mixture. Each corner of the triangle corresponds to a pure component. The diagram has colored arrows to help you understand how the mass fraction of each component is determined. Additionally, this simulation includes the ability to quiz yourself by hiding the mass fraction and randomly picking a spot on the graph. This is a great way to prepare for an exam or just brush up on your ternary diagram knowledge.