Final answer:
The sodium concentration of mineral water with a concentration of 0.005% (m/v) is 50 ppm.
Step-by-step explanation:
When converting from percent concentration to ppm (parts per million), we need to understand that 1% equals 10,000 ppm. So, if the sodium concentration in a bottle of mineral water is 0.005% (m/v), we simply multiply this by 10,000 to get the concentration in ppm:
0.005% × 10,000 = 50 ppm.
Hence, the sodium concentration of this mineral water is 50 ppm.