1000 gram aqueous solution of `CaCO_(3)` contains 20 gram of carbonate. Concentration of solution is:

Options

A. 20 ppm
B. 200 ppm
C. 2000 ppm
D. 20,000 ppm

Answer

To find the concentration of the aqueous solution of calcium carbonate (CaCO₃) in parts per million (ppm), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the mass of solute and mass of solution**:
- The mass of the solute (carbonate) is given as 20 grams.
- The mass of the solution is given as 1000 grams.

2. **Use the formula for concentration in ppm**:
- The formula for concentration in parts per million (ppm) is:
\[ \text{ppm} = \left( \frac{\text{mass of solute}}{\text{mass of solution}} \right) \times 10^6 \]

3. **Substitute the values into the formula**:
- Plugging in the values we have:
\[ \text{ppm} = \left( \frac{20 \text{ grams}}{1000 \text{ grams}} \right) \times 10^6 \]

4. **Calculate the concentration**:
- First, calculate the fraction:
\[ \frac{20}{1000} = 0.02 \]
- Now multiply by \(10^6\):
\[ 0.02 \times 10^6 = 20,000 \text{ ppm} \]

5. **Final answer**:
- The concentration of the solution is **20,000 ppm**.