What are the limitations of litmus paper and phenolphthalein indicators? Name two other indicators that can be used that do not have such limitations.

Isec i will do it and them i will let you know

Answer earth,water,fire and air;

A)  it is neutral because the concentration of hydronium ions equals that of hydroxide ions

Well you can immediately rule out a and d because if a metal were to lose or gain protons, then it would become a different element all together. the answer here is b because the positive symbol with a number refers to how many electrons the metal can give away to become stable.