Indicate how 18 kg of a 30 ppm KBr solution is prepared from the pure reagent.

1. Determine the parts per million (ppm) concentration:
C = \frac{m(KBr)}{m(\text{total solution})} \times 10^6

2. Substitute the given values and solve for \(m(KBr)\):
30 = \frac{m(KBr)}{18} \times 10^6

3. Simplify:
m(KBr) = \frac{30 \times 18}{10^6}

4. Calculate \(m(KBr)\):
m(KBr) = 0.00054 \text{ kg}