100g of salt is present in 500g of solution. Calculate the mass percentage of the solution.

Options

A. 10%
B. 20%
C. 30%
D. 40%

Explanation

To calculate the mass percentage of salt in the solution, we can follow these steps:

### Step 1: Identify the mass of the solute and the mass of the solution.
- **Mass of solute (salt)** = 100 g
- **Mass of solution** = 500 g

### Step 2: Use the formula for mass percentage.
The formula for mass percentage is given by:

\[ \text{Mass Percentage} = \left( \frac{\text{Mass of solute}}{\text{Mass of solution}} \right) \times 100 \]

### Step 3: Substitute the values into the formula.
Substituting the values we identified:

\[ \text{Mass Percentage} = \left( \frac{100 \, \text{g}}{500 \, \text{g}} \right) \times 100 \]

### Step 4: Calculate the fraction.
Calculating the fraction:

\[ \frac{100}{500} = \frac{1}{5} \]

### Step 5: Multiply by 100 to find the mass percentage.
Now, multiply by 100:

\[ \text{Mass Percentage} = \left( \frac{1}{5} \right) \times 100 = 20\% \]

### Conclusion
The mass percentage of salt in the solution is **20%**.

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