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?

Clara wrote the following hypothesis for an experiment about acidophilic bacteria. bacteria cells will stop dividing in a basic (alkaline) environment because of the high ph. which statement is the best way to restate the hypothesis so that it is more specific? growing acidophilic bacteria in some environments will cause the cells to stop dividing because of ph. if the ph of their environment is changed, acidophilic bacterial cell division will be affected. if the environment of acidophilic bacterial cells becomes alkaline, the bacteria will stop dividing. the more alkaline an environment, the less cell division will occur in bacteria.