50 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.

Explanation

To find the concentration of the sodium chloride solution, we can follow these steps:

### Step 1: Identify the mass of solute and solvent
- Mass of sodium chloride (solute) = 50 g
- Mass of water (solvent) = 100 g

### Step 2: Calculate the mass of the solution
The mass of the solution is the sum of the mass of the solute and the mass of the solvent.
- Mass of solution = Mass of solute + Mass of solvent
- Mass of solution = 50 g + 100 g = 150 g

### Step 3: Calculate the concentration of the solution
Concentration can be calculated using the formula:
\[ \text{Concentration} = \left( \frac{\text{Mass of solute}}{\text{Mass of solution}} \right) \times 100 \]

Substituting the values:
- Concentration = \( \left( \frac{50 \, \text{g}}{150 \, \text{g}} \right) \times 100 \)

### Step 4: Perform the calculation
- Concentration = \( \left( \frac{50}{150} \right) \times 100 = \frac{1}{3} \times 100 = 33.33\% \)

### Final Answer
The concentration of the sodium chloride solution is **33.33%**.

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