The Ka values for several weak acids are given below. Which acid (and its conjugate base) would be the best buffer at pH 3.7? a. MES: Ka 7.9 x 10
b. HEPES; Ka 3.2 x 103
c. Tris; Ka 6.3 x 109
d. Formic acid: K 1.8 x 10
e. Acetic acid: K 1.8 x 10
Abbreviations:
MES, 4-Morpholineethanesulfonic acid
HEPES; 4-(2-Hydroxyethyl) piperazine-1-ethanesulfonic acid
Tris, 2-Amino-2-hydroxymethyl-propane-1,3 -diol

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -

Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]