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=

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

What are the 4 phases of matter in order of increasing engery content?

Compare and contrast the bohr model and the electron cloud models of the atom.