Use the Ka values for weak acids to identify the best components for preparing buffer solutions with the given pH values. Name Formula Ka
Phosphoric acid H3PO4 7.5 x 10^-3
Acetic acid CH3COOH 1.8 x 10^-5
Formic acid HCOOH 1.8 x 10^-4

pH 1.9 =
pH 5.0 =
pH 3.9=

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Connect the whole numbers on the periodic table to indicate what they represent?