Consider a solution prepared by mixing a weak acid HA and HCl. What are the major species? Explain what is occurring in solution. How would you calculate the pH? What if you added NaA to this solution? Then added NaOH?
Earth History Early Life Chemosynthetic Organisms: inject sulfur into the atmosphere Places today that prove how Earth’s processes occurred at the beginning of the planet’s life, also organisms living in these places can prove that Yellowstone National Park: Archaea (first organisms & THEN chemosynthetic organisms evolved on Earth) Archean Life: Stromatolites: cyanobacteria (blue – green algae) 1 life (prokaryotes): 3.5 billion years ago Steranes: molecular fossils 2.7 billion years ago Chemicals that are part of eukaryotic cells (2.1 billion years ago) Organisms: CaCO3 (invertebrates) CaPO4 (bone) late Proterozoic Hard parts: store crucial elements & protect soft parts & anchorage structure for muscles & tissues defensive structure Archean cratons formed during collisions of island arcs and minicontinents during the period of the formation of Laurentia