Separation by evaporation

The video explains that while water molecules in spring and tap water are identical, spring water contains more minerals like calcium and magnesium. These minerals dissolve as water flows over rocks, forming a solution. Soluble substances like minerals can be separated from water through evaporation. Heating water to 100°C causes it to evaporate, leaving minerals behind. This process explains why spring water has a distinct flavor due to its mineral content.

What is the primary difference between spring water and tap water?

• Tap water has a higher pH level.

• Spring water is free of any minerals.

• Spring water contains more dissolved minerals.

• Tap water is always colder.

How do minerals become part of spring water?

• They are added artificially.

• They dissolve from rocks as water flows over them.

• They are present in the air and mix with the water.

• They are filtered from the soil.

What term is used to describe substances that dissolve in water?

• Permeable

• Impermeable

• Soluble

• Insoluble

What happens to water molecules when spring water is heated to 100°C?

• They lose energy and condense.

• They freeze.

• They gain energy and evaporate.

• They become solid.

Why does spring water have a distinct taste compared to tap water?

• It has added flavors.

• It is colder.

• It is carbonated.

• It contains dissolved minerals.