Dilute and Concentrated Acids Flashcards

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What is meant by a concentrated acid solution?

A concentrated acid has a large amount of acid dissolved in a small volume of water. There are many acid particles in each volume of the solution.

What is meant by a dilute acid solution?

A dilute acid has only a small amount of acid dissolved in a larger volume of water. There are fewer acid particles in each volume of the solution.

If two acid solutions have the same volume, how do you know which is more concentrated?

The solution that contains more acid in that same volume is more concentrated. It has more acid particles packed into the space.

How can you make an acid solution more dilute?

You make an acid more dilute by adding more water to it. This spreads the acid particles out in a larger volume.

What is the safe way to dilute a concentrated acid in the lab?

Slowly pour the acid into water while stirring. Never add water to concentrated acid, because it can splash and cause burns.

What happens to the pH of an acid solution when you dilute it with water?

The pH value increases but stays below 7. The solution is still acidic, but it is less acidic than before.

How does the concentration of an acid affect how fast it reacts?

A more concentrated acid usually reacts faster. This is because there are more acid particles to collide and react each second.

In a particle model diagram, how can you tell if an acid is concentrated?

A concentrated acid is shown with many acid particles crowded into a small space. A dilute acid has only a few acid particles in the same space.

What is the difference between a strong acid and a concentrated acid?

A strong acid releases lots of hydrogen ions when it dissolves in water. A concentrated acid has a lot of acid particles in each volume of solution, whether it is strong or weak.

If you double the volume of water in an acid solution but keep the amount of acid the same, what happens to the concentration?

The concentration becomes half as much as before. The same amount of acid is now spread through twice the volume of water.