Consider the following data on some weak acids and weak bases: name hydrocyanic acid hypochlorous acid acid solution 0.1 M NaCN 0.1 M KCIO 0.1 M KNO3 0.1 M HONH3Cl Ka formula HCN 4.9 × 10 HClO - 10 3.0 × 10-8 Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. pH choose one choose one ✓ choose one base choose one ✓ K₂ formula hydroxylamine HONH₂ 1.1 × 10-8 pyridine C₂H₂N name 1.7×10 ⁹ -9

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Which of the following acids at 0.1 M concentration has the lowest pH(most acidic) in an aqueous solution? Answer Choices: acetic acid, Ka = 1.8 x 10-5, phosphoric acid, Ka = 7.5 x 10-3, nitrous acid, Ka = 4.5 x 10-4, hydrocyanic acid, Ką = 4.0 x 10-10, -8 hydrogen sulfite ion, Ka = 6.2 x 10°

In an aqueous solution of a certain acid the acid is 28.% dissociated and the pH is 1.99. Calculate the acid dissociation constant Kof the acid. Round your answer to 2 significant digits. K = 0 a x10 X Ś

Identify the conjugation acid-base pairs in the following reactions. An acid donates a proton to become a conjugate base. A base accepts a proton to form a conjugate acid.

A solution has a pH of 3.76. What is the molarity concentration of H3O+ and OH¹ in this solution? A) [H3O+] = 5.8 x 10-11, [OH] = 1.7 x 10-4 B) [H3O+] 1.7 x 104, [OH] = 5.8 x 10-11 = [H3O+] = 1.7 x 104, [OH] = 5.8 x 10-10 D) [H3O+] = 5.8 x 10+³, [OH] = 1.7 x 10+10

Which solution below has the highest concentration of hydroxide ions? pH = 8.2 pH = 5.6 pH = 3.7 pH = 11.0 pH = 11

The chemical formulae of some acids are listed in the first column of the table below, and in the second column it says whether each acid is strong or weak. Complete the table. List the chemical formula of each species present at concentrations greater than about 10-6 mol/L when about a tenth of a mole of the acid is dissolved in a liter of water. acid H₂PO4 H Br H₂S HCIO₂ strong or weak? weak strong weak weak species present at 10-6 mol/L or greater when dissolved in water 0 0 0 0 X 0,0,... Ś

Complete the table below. Be sure each of your answer entries has the correct number of significant digits. You may assume the temperature is 25 °C. conjugate acid formula HNO₂ HCH, CO₂ Ka 4.5 × 10 -4 -5 1.8 x 10 conjugate base K₂ formula CHONH 0 2.1 10 0- X 3

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