For a triprotic acid (H3G) has pKa1 = 2.10, pKa2 = 6.10, pKa3 = 10.10. (A) what's the conjugated base of HV2- ?
(B) At what pH the concentration [H3V-] = [V2-]?
(C) what reagent/s are needed to prepare an pH 10.00 buffer, assuming you have access to strong acid and strong base in addition to the H3V? Describe qualitative how you would prepare the needed pH buffer, and what are the criteria to evaluate whether the pH buffer is good/effective.

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas. in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

Condensation happens when water vapor cools. true or false? ?