Write balanced, net ionic equations when the following compounds are mixed. Indicated mixtures where no reaction is expected with the notation "no rxn".
a. MnS(s) with dilute hydrochloric acid
b. NiS(s) with dilute hydrochloric acid
c. CoS(s) in hot nitric acid
d. Cr(OH)3(s) with concentrated sodium hydroxide solution
e. Cr(OH)3(s) with hydrogen peroxide and a concentrated sodium hydroxide solution
f. K2CrO4(aq) with a lead acetate solution