Final answer:
Boric acid (BHA) typically starts as H₃BO₃, a solid which dissolves in water to form boric acid solution. The hydroxide anion (OH⁻) commonly comes from bases like NaOH or KOH, which release OH⁻ ions upon dissolution in water.
Step-by-step explanation:
The student appears to be inquiring about the starting forms of boric acid (BHA) and hydroxide anion (OH⁻). To begin with, boric acid usually starts as the compound H₃BO₃ in solid form, which can be dissolved in water to form the boric acid solution. On the other hand, the hydroxide anion (OH⁻) typically originates from bases such as sodium hydroxide (NaOH) or potassium hydroxide (KOH) which, when dissolved in water, dissociate to form OH⁻ ions.