The system below is at equilibrium. NH3(aq) + H2O(l) ↔ NH4 +(aq) + OH- (aq) According to the Bronsted-Lowry theory, the H2O(l) acts as A. A base by donating a proton. B. An acid by donating a proton. C. An acid by receiving a proton. D. A base by receiving a proton.

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

How does the viscosity of magma change as magma cools?

Is a pencil falling to the floor anon contact force, a force, or a contact force