Students will be able to develop and explain a particle-level model to describe their observations of water dissolving salt, the water evaporating, and the salt crystals re-forming. Dissolving a solid ...

Students first use a dissolving test to see how salt and sugar dissolve in water. Students then run the same dissolving test on substances A, B, and C; identify the salt and sugar; and conclude that ...

"There is no hard and fast rule as to the appropriate concentration for salt water gargles, but I recommend dissolving 1/2 teaspoon of salt in 1 cup (or 8 oz) of warm water." Some people choose to ...