A student wants to determine the Ka of an acid, she believes is the pyridinium ion (CsH5NH(aq)). She creates a solution that has a concentration of 0.561 mol/L and measures the pH to be 1.18. 6 Determine the equilibrium constant (Ka) of the pyridinium ion acidic solution. Include the following with your answer a Bronsted-Lowry reaction of the acid reacting with water, the correct equilibrium expression and show all your work, calculations, charges, units. Record your answer to the correct significant digits (4 marks) Your answer I 00 8 and the [OH(aq)] in a Sodium phosphate can be described as a solution with a pH = 12.70 is ii The statement above is best completed by the answers in row Row i ji proton acceptor proton acceptor 5.0 x 10-2 mol/L 2.0 x 10-13 mol/L 5.0 x 10-2 mol/L 2.0 x 10-13 mol/L proton donor DO proton donor Prev Next Bronsted Lowry Acid Base Reactions H, CrO (aq) +H,P20,2(aq) HCro, (aq) +HP,0, (aq) (products favoured H, SO, (aq) +HTeOz (aq)-H SO,? - (aq) +H, TeO3(aq) (reactants favoured HP,0, (aq) +HTeO3(aq) + HP,0,2- (aq) +H, TeO3(aq) (products favoured 1.H2C104(aq) 2.H2SO42-(aq) 3.H2TeO3(aq) 4.HCrO4 (aq) 5.H2P20,2-(aq) 6.HTeO3(aq) 7. H3P207 (aq) 8. H3Si04 (aq) 10. Using the list above, rank the bases in order of the strongest base to the weakest base. Strongest Base Weakest Base (record in the first box) (record in the second box) (record in the third box) (record in the fourth box) (Record your four-digit answer in the numerical-response section below.) Your answer: 100