Hydration Calculator. Follow 3 easy steps to see whether you are drinking enough water. The calculator will work out your hydration level based on the information you give about yourself and your daily drinking habits. ( See the methodology.
Arrhenius Acids and Bases. The Arrhenius definition of acids and bases is one of the oldest. An Arrhenius acid is a substance that when added to water increases the concentration of H1+ ions present.The chemical formulas of Arrhenius acids are written with the acidic hydrogens first.An Arrhenius base is a substance that when added to water increases the concentration of OH1- ions present.HCl is an example of an Arrhenius acid and NaOH is an example of an Arrhenius base.he chemical formulas of Arrhenius acids are written with the acidic hydrogens first. An Arrhenius base is a substance that when added to water increases the concentration of OH1- ions present.
Acids provide the H + ion; bases provide the OH-ion; and these ions combine to form water. H+(aq) + OH-(aq) H2O(l). The Arrhenius theory has several disadvantages. 1  It can be applied only to reactions that occur in water because it defines acids and bases in terms of what happens when compounds dissolve in water.rrhenius acids include compounds such as HCl, HCN, and H 2 SO 4 that ionize in water to give the H + ion. Arrhenius bases include ionic compounds that contain the OH-ion, such as NaOH, KOH, and Ca(OH) 2.