And the problem would be even worse if you were trying to count a population in the thousands or millions! Not only would it be impossible to count the colonies, but not all colony-forming units would be able to form colonies because of the overcrowding and competition for nutrients. This is where dilution saves the day. Not just dilution, but serial dilution… meaning dilution over and over again.
Why do we dilute? Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:. Skip to main content. Aqueous Reactions. Search for:. Dilutions of Solutions. Learning Objective Calculate the concentration of a diluted solution. When calculating dilution factors, it is important that the units of volume and concentration remain consistent. A serial dilution is a series of stepwise dilutions, where the dilution factor is held constant at each step.
The amount of water added to a solute will change its concentration. A solution that is concentrated has less water added to it. A solution that is dilute has more water added into it. The amount of water added into a solute will only change the volume of the solute and thus the concentration of the solute will change.
However, the moles of the solute and the mass of the solute will not change. The moles and the mass of the solute will remain the same. For example, you put in 4 tablespoons of sugar in a glass of water ml of water.
The water becomes very sweet. We can say that the solution is concentrated. Then you add 3 more glasses of water into the solution. The water now becomes less sweet as the solution has diluted. The concentration of the sugar changed but it is to be noted that the tablespoons of sugar remained the same. The 4 tablespoons of sugar now moved about in a liter of water rather than a glass of water.
Dilution of solutions helps us in many ways.
0コメント