Calculate the pH of the buffer that results from mixing 57.9 mL of a 0.278 M solution of HCHO2 and 17.1 mL of a 0.535 M solution of NaCHO2. The Ka value for HCHO2 is 1.8×10−4.

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.