ACT Preparation / Unit 22 ACT 2114 short lesson, about 20 seconds
Solutions and Concentration
Captions available
The idea
A solution is a uniform mixture of a solute dissolved in a solvent. Its concentration measures how much solute is in a given amount of solution.
In practice
20 grams of salt in 100 milliliters of solution is twice as concentrated as 10 grams in the same volume.
Where people slip
Adding solvent dilutes a solution: the solute stays the same, but its concentration falls.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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