A certain substance has a solubility of 12 grams in 100 grams of water at 20°C. This means that _____
the substance will begin to dissolve when 12 grams are present in solution
when 12 grams of the substance are stirred into a beaker with 100 g of water, it will begin settling at the bottom
when 12 g of the substance are dissolved in 100 grams of water, the solution will be dilute
when 12 g of the substance are dissolved in 100 grams of water, the solution will be saturated
The correct answer is: when 12 g of the substance are dissolved in 100 grams of water, the solution will be saturated.
When a substance has a solubility of 12 grams in 100 grams of water at 20°C, it means that when 12 grams of the substance are dissolved in 100 grams of water, the solution will be saturated.
To understand this, let's break it down. Solubility refers to the maximum amount of a substance that can dissolve in a given solvent at a specific temperature. In this case, the given solvent is water, and the temperature is 20°C.
So, when we say the solubility is 12 grams in 100 grams of water, it means that at 20°C, 12 grams of the substance can be dissolved in 100 grams of water, and no more. If we try to add more than 12 grams of the substance to 100 grams of water, the excess substance will not dissolve, and it will settle at the bottom of the solution.
Therefore, the correct answer is that when 12 grams of the substance are dissolved in 100 grams of water, the solution will be saturated.