You want to study the oxygen binding ability of hemoglobin at ph 7.21 and ph 7.60. you decide to use a phosphate buffer.
a) how would you make up 500 ml of 50 mm phosphate buffer, ph 7.21, starting with 1.00 m h3po4 and either 10.0 m hcl or 10.0 m naoh?
b) how would you make up 500 ml of 50 mm phosphate buffer, ph 7.60, starting from your 50mm phosphate buffer at ph 7.21?

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases