A solution is made by dissolving 10 grams of salt in 1 liter of water, forming a saltwater solution. Additional water is added to increase the total volume to 2 liters. Which of the following statements describes the effect of the added water on the concentration of the salt solution?
The concentration of the solution decreases by half.
When additional water is added to the saltwater solution, the total volume increases while the amount of salt remains unchanged. This dilution effect results in a reduction of the salt concentration, which in this case decreases to half of its original concentration.
Doubling the concentration would imply that the quantity of salt has increased while maintaining the same volume, which is not the case here. Since the same amount of salt (10 grams) is dissolved in a larger volume (2 liters), the concentration cannot double; instead, it decreases.
A decrease by one-fifth suggests a minor reduction in concentration, but the actual dilution is much more significant. The original concentration was 10 grams per liter, and after dilution to 2 liters, it becomes 5 grams per liter, resulting in a decrease of 50%, not one-fifth.
This option is incorrect because adding more water to the solution increases the total volume while keeping the salt quantity constant. Consequently, the concentration cannot remain the same as the solution becomes more diluted.
This accurately reflects the situation; with 10 grams of salt now in 2 liters of solution, the concentration is halved from 10 grams per liter to 5 grams per liter. This is the fundamental effect of dilution.
In summary, the addition of water to the saltwater solution leads to a dilution that decreases the concentration of salt. The concentration decreases from 10 grams per liter to 5 grams per liter, effectively halving it. Understanding this concept of dilution is critical in various applications, such as preparing solutions in chemistry and culinary practices.
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