Considering particles at the subatomic level, carrying out this experiment would help to identify the metals given that: Ca has the larger/smaller atomic radius. In chemical reactions, it would be easier/harder
for it to lose its valence electrons to form ions. This means it has comparatively higher/lower ionization energies and would react more quickly/slowly
with the water.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.