What is the pH of a solution with a hydronium ion concentration of 0.0001 M?

Consider the following data on some weak acids and weak bases: name nitrous acid acid hypochlorous acid HCIO 0.1 M NaNO₂ 0.1 M KBr solution 0.1 M KCIO 0.1 M HONH3Cl K a formula HNO₂ 4.5 × 10 3.0 × 10 8 pH choose one ✓ Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. choose one ✓ choose one ✓ base ✓ choose one 1 (lowest) 2 3 4 (highest) formula hydroxylamine HONH₂ methylamine CH3NH₂ name Kh 1.1 × 10 4.4 × 10 -8 4 18 Ar

Describe how water is both an acid and a base. Why is this? How can one molecule be both an acid and a base?

What would be the pH of a solution that produces H3O+ ions at a concentration of 3.7 x 10-4 M? Write your answer with the correct number of significant figures and no units.