If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.89, which of the following is TRUE?

a. {HCHO_2} = {NaCHO_2}
b. {HCHO_2} >> {NaCHO_2}
c. {HCHO_2} > {NaCHO_2}
d. {HCHO_2} < {NaCHO_2}
e. It is not possible to make a buffer of this pH from HCHO_2 and NaCHO_2.

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest

Calculate the concentration of all species in a 0.165 m solution of h2co3.