1. Rank the following species in order of increasing acidity (1: strongest acid, 4: weakest acid). a. HCU 2 NaOH 4 HF 3 H3O+ b. H.C NH CH3 4 NH NH NH CH2 CH H₂C H₂C H₂C OH 1 2 3

1.   State whether solutions at 25 °C with the following species concentrations are acidic, basic or neutral.a.    [H3O+] = 5 x 10-10 mol L-1b.    [H3O+] = 7 x 10-7 mol L-1c.    [OH-] = 3 x 10-9 mol L-1

Please help with number 4

15. Which of the following is the strongest acid? H OH OH О 16. Which of the following is the weakest acid? OH OH HH О 17. Which of the following is the strongest base? 18. Which of the following is the weakest base?

According to Lewis acid-base theory, a base is defined as a/an OA electron acceptor OB. proton donor OC proton acceptor O D. electron donor OE produces OH- in solution QUESTION 18 Rank the acids from strongest to weakest 1-strongest-> 6 weakest acid HO. b. NO2 O OH

3. Calculate the value of [H3O+]from the given [OH Jin each solution and label the solution as acidic or basic: a. [OH-] = 105 M b. [OH] = 10-¹2 M.