Answer:
If the hydronium concentration increases, the pH decreases, causing the solution to become more acidic. This happens when an acid is introduced. As H+ ions dissociate from the acid and bond with water, they form hydronium ions, thus increasing the hydronium concentration of the solution.
Hypothesis: If i increase the amount of string then the salt will dissolve faster
Independent variable: the amount you stir the liquid
Dependent variable: the time it takes to dissolve the salt
Materials: you need a beaker, salt, water, and a stir rod.
Answer:
A energy loss through heat
Ginkgo, Gnetales, Cycads, and conifers.