Question 77
Some learners have been investigating the mass of copper sulfate that can be dissolved in water at different temperatures. The learners added copper sulfate until no more would dissolve. They carefully measured the mass of copper sulfate they added. Here are their results.
| Temperature of water in °C | 20 | 30 | 40 | 50 | 60 | 70 | 80 |
|---|---|---|---|---|---|---|---|
| Mass of copper sulfate dissolved in g | 22 | 24 | 28 | 32 | 30 | 46 | 58 |
Name one variable that the learners should keep the same.
| Temperature of water in °C | 20 | 30 | 40 | 50 | 60 | 70 | 80 |
|---|---|---|---|---|---|---|---|
| Mass of copper sulfate dissolved in g | 22 | 24 | 28 | 32 | 30 | 46 | 58 |
Name one variable that the learners should keep the same.
