A solution contains 40 g of common salt dissolved in 320g of water calculate the mass concentration of the solution

Answer

To calculate the mass concentration of the solution containing common salt and water, follow these steps:

### Step 1: Identify the mass of the solute and solvent
- **Mass of solute (common salt)** = 40 g
- **Mass of solvent (water)** = 320 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** = 40 g + 320 g = 360 g

### Step 3: Use the formula for mass concentration
- The formula for mass concentration (percentage mass concentration) is:
\[ \text{Mass Concentration} = \left( \frac{\text{Mass of solute}}{\text{Mass of solution}} \right) \times 100 \]

### Step 4: Substitute the values into the formula
- Substitute the known values into the formula:
\[ \text{Mass Concentration} = \left( \frac{40 \, \text{g}}{360 \, \text{g}} \right) \times 100 \]

### Step 5: Calculate the mass concentration
- Perform the calculation:
\[ \text{Mass Concentration} = \left( \frac{40}{360} \right) \times 100 = 11.11\% \]

### Final Answer
- The mass concentration of the solution is **11.11%**.

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