Calculate how to prepare 750 ml of 0.25 m sodium formate buffer at ph 4. use your textbook to determine the molecular weight and pka of the acid and base. calculate the grams of sodium formate and number of milliliters of formic acid required. then using this stock solution, calculate and describe how you would prepare 100 ml of a 10 mm formate buffer, ph 3.5. by the way, what is the molarity of formic acid?

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

What’s the percent by mass of carbon in c10h14n2

What is the maximum number of electrons that an atomic orbital can contain?