The triprotic acid H 3 A H3A has ionization constants of K a1 = 2.50 × 10 − 3 Ka1=2.50×10−3 , K a2 = 5.60 × 10 − 6 Ka2=5.60×10−6 , and K a3 = 6.47 × 10 − 12 Ka3=6.47×10−12 . Calculate the H + H+ concentration and the ratio [ H 2 A − ] [ H 3 A ] [H2A−][H3A] for a 0.0570 0.0570 M solution of NaH 2 A NaH2A .

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?