To determine which solution has the highest concentration of salt (NaCl), we can calculate the concentration of each solution using the formula:
\[ \text{Concentration (g/mL)} = \frac{\text{mass of NaCl (g)}}{\text{volume of water (mL)}} \]
Now, let's calculate the concentration for each solution:
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Solution A: \[ \text{Concentration A} = \frac{5.0 , \text{g}}{50.0 , \text{mL}} = 0.1 , \text{g/mL} \]
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Solution B: \[ \text{Concentration B} = \frac{5.0 , \text{g}}{75.0 , \text{mL}} \approx 0.0667 , \text{g/mL} \]
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Solution C: \[ \text{Concentration C} = \frac{5.0 , \text{g}}{100.0 , \text{mL}} = 0.05 , \text{g/mL} \]
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Solution D: \[ \text{Concentration D} = \frac{5.0 , \text{g}}{125.0 , \text{mL}} = 0.04 , \text{g/mL} \]
Now we can compare the concentrations:
- Concentration A: 0.1 g/mL
- Concentration B: 0.0667 g/mL
- Concentration C: 0.05 g/mL
- Concentration D: 0.04 g/mL
The solution with the highest concentration of salt is Solution A with a concentration of 0.1 g/mL.