The solubility of sodium nitrate in water varies depending on the temperature. Here are the solubility values for sodium nitrate in water at different temperatures:

- At 0°C: 72 g/100 mL of water

- At 20°C: 90 g/100 mL of water

- At 50°C: 132 g/100 mL of water

- At 100°C: 180 g/100 mL of water

This indicates that the solubility of sodium nitrate increases as the temperature of water increases.