Predict the pH of a 0.0050 M solution of a weak, polyprotic acid.
Ka, = 4.3 x 10-7
Ka, = 5.6 x 10-11
pH = [?]

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?