Quick calculations. Be sure to attend to significant digits. a) The pH of a solution is 10.36. What are the hydronium ion and hydroxide ion concentrations? [H_3O^+] = ____ [OH^-] = ____ b) What is the value of pKa for hydrogen sulfide (H_2S)? pK_a = ____ c) For the weak base, CH_3NH_2, the value of K_b is 4.4 times 10^4. Answer the following questions based on this information. What is the formula of the conjugate acid? ____ What is the value of K_a for the conjugate acid? ____