When washing hands to eat terumah, why must a second washing be performed?
Halacha 3 explains that the first water contracted impurity from the hands; the second washing with other water is needed to remove that impure first water.
Question 2
A person washes one hand first (first water), then tries to wash both hands together (second water). What is the result?
Halacha 5 rules that if one washed one hand with first water and then tried to wash both hands together as the second water, the second water contracts impurity from the still-impure hand, rendering both hands impure.
Question 3
What is the minimum amount of water required to wash both hands for the initial washing?
Halacha 8 states that the minimum is a revi'it for each and every person for both their hands — one revi'it is the minimum for the pair of hands of one person.
Question 4
According to the Rambam's conclusion, how does immersion in a mikveh actually purify a person?
Halacha 12 concludes that purity and impurity are Scriptural decrees (chukim) beyond human understanding; immersion purifies not by physical action but by divine decree upon one who immerses with intent.
Question 5
A person resolves in his heart to become pure but does not actually immerse in a mikveh. Is he pure?
Halacha 12 explicitly states: 'one who intends but does not immerse remains impure' — resolve alone, without the actual act of immersion, is insufficient.