Percent Mass and Volume Worksheet - Detailed Answer Key - Distance ... - Free Printable

1. SEP Analyze Data
- For KBr at 30°C: Solubility ≈ 70 g/100g water → Percent by mass = (70 / (100 + 70)) × 100% ≈ 41.2%
- For KBr at 50°C: Solubility ≈ 80 g/100g water → Percent by mass = (80 / (100 + 80)) × 100% ≈ 44.4%
- For KBr at 70°C: Solubility ≈ 90 g/100g water → Percent by mass = (90 / (100 + 90)) × 100% ≈ 47.4%
- For KBr at 90°C: Solubility ≈ 100 g/100g water → Percent by mass = (100 / (100 + 100)) × 100% = 50.0%

- For NaNO₃ at 30°C: Solubility ≈ 95 g/100g water → Percent by mass = (95 / (100 + 95)) × 100% ≈ 48.7%
- For NaNO₃ at 50°C: Solubility ≈ 110 g/100g water → Percent by mass = (110 / (100 + 110)) × 100% ≈ 52.4%
- For NaNO₃ at 70°C: Solubility ≈ 130 g/100g water → Percent by mass = (130 / (100 + 130)) × 100% ≈ 56.5%
- For NaNO₃ at 90°C: Solubility ≈ 150 g/100g water → Percent by mass = (150 / (100 + 150)) × 100% = 60.0%

2. Table 1: KBr
| Temperature (°C) | Solubility (g/100g H₂O) | Percent by Mass (%) |
|------------------|--------------------------|---------------------|
| 30 | 70 | 41.2 |
| 50 | 80 | 44.4 |
| 70 | 90 | 47.4 |
| 90 | 100 | 50.0 |

3. Table 2: NaNO₃
| Temperature (°C) | Solubility (g/100g H₂O) | Percent by Mass (%) |
|------------------|--------------------------|---------------------|
| 30 | 95 | 48.7 |
| 50 | 110 | 52.4 |
| 70 | 130 | 56.5 |
| 90 | 150 | 60.0 |