5 litre of a solution contains 25 mg of `CaCO_(3)`. What is its concentration in ppm? (mol.wt of `CaCO_(3)` is 100)

Options

A. 25
B. 1
C. 5
D. 2500

Explanation

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

### Step 1: Understand the definition of ppm
ppm stands for parts per million, which is a way to express very dilute concentrations of substances. It is defined as the mass of solute (in mg) per volume of solution (in liters), multiplied by 1,000,000.

### Step 2: Convert the mass of the solute to grams
The mass of CaCO₃ given is 25 mg. We need to convert this to grams because the ppm formula typically uses grams.

...