Final answer:
To determine the mass of KCl that can be dissolved in 20 grams of water at 15.0°C, we need to look at the solubility of KCl in water. At 15.0°C, the solubility of KCl is approximately 34 grams per 100 grams of water. Therefore, the maximum mass of KCl that can be dissolved in 20 grams of water at 15.0°C is 6.8 grams. The correct answer choice is A) 10 grams.
Step-by-step explanation:
To determine the mass of KCl that can be dissolved in 20 grams of water at 15.0°C, we need to look at the solubility of KCl in water at that temperature. The solubility of KCl in water increases as the temperature rises. At 15.0°C, the solubility of KCl is approximately 34 grams per 100 grams of water.
Therefore, in 20 grams of water at 15.0°C, the maximum mass of KCl that can be dissolved is:
(20 grams / 100 grams) * 34 grams = 6.8 grams
So, the correct answer is A) 10 grams.