Solubility is the amount of one substance that will dissolve in another substance. When a substance dissolves, it breaks into individual particles.

At first, the sugar can be seen. While stirring, the sugar breaks into parts so tiny that they cannot be seen. These parts are surrounded by the water. Together the water and sugar have formed a solution

The difference between particles of matter, such as atoms and molecules, and tiny bits of a substance, such as small sugar cubes. A tiny spec of sugar can be seen, but particles of matter are much too small to see. When a substance dissolves, it breaks down into tiny bits of matter, but it does not always break down into individual atoms or molecules

The properties of the salad ingredients stayed the same when they were mixed. Some of the ingredients were cut into smaller parts before they were mixed, and they stayed the same smaller size after the salad was made.

What are the ingredients like before they are mixed to make the salad? 

What are the ingredients like when you eat the salad? 

When two substances are mixed, the mass of the mixture is equal to the total mass of the ingredients. This means matter is conserved. Mass is the amount of matter in an object. When we mix substances together, we are combining their matter. Because of this, we add their masses together.

Substance A = 30 

Substance B = 20 g

30 g + 20 g = 50 g

The mixture has a mass of 50 g.

When answering practice problems, use your plan-of-attack strategy. Really think through the question and your experiences.