Consider the substances arsine, AsH₃, and phosphine, PH₃, that are analogous to ammonia, NH₃. Write chemical equations illustrating the basic character of arsine and phosphine. Write formulas for the ions formed by NH₃, AsH₃, and PH₃ with H⁺. Order these ions by their acidic character. Explain how you arrived at this order. Now compare the basicities of the substances AsH₃, PH₃, and NH₃, ordering them by their basic character, from least to most basic. Explain how you arrived at this order.