The buffer capacity of adding naoh to a mixture that has a concentration of acetic acid = 1.500 m and a concentration of acetate ions = 0.500 m is closest to:

(ka for ch3cooh = 1.75 x 10-5)

a) 1.038

b) 0.722

c) 0.435

d) 0.187

e) 0.500

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.