Final answer:
To make a 12% NaCl solution in 1.5 L of water, one would need to dissolve 180 grams of sodium chloride. The 12% refers to having 12 grams of NaCl per 100 grams of the total solution.
Therefore, the correct answer is C. 180 g.
Step-by-step explanation:
To calculate how many grams of sodium chloride (NaCl) should be dissolved in 1.5 L of water to make a 12% solution, we need to understand that a 12% solution means 12 grams of NaCl are present in every 100 grams of solution.
Therefore, for 1.5 L (which is equivalent to 1500 mL or 1500 g of water assuming the density of water is 1 g/mL), the amount of NaCl needed would be 12% of the total mass of the solution. The total mass of the solution includes both the mass of the water and the mass of NaCl. To find the mass of NaCl, we use the equation:
Total mass of solution = Mass of water + Mass of NaCl
Let x be the mass of NaCl.
Then, we have 1500 g + x = x / 0.12.
Solving for x gives us x = 180 g.
Therefore, the correct answer is C. 180 g.