Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.

Start Practicing

Worksheet: Combining Acid and Base Equilibria

Q1:

Hydrogen telluride ( H T e ) 2 is a diprotic acid with ๐พ a 1 = 2 . 3 ร— 1 0 ๏Šฑ ๏Šฉ and ๐พ a 2 = 1 . 3 ร— 1 0 ๏Šฑ ๏Šง ๏Šจ .

What is ๐พ b for the reaction in which H T e โ€“ functions as a base in water?

  • A 1 . 3 ร— 1 0 ๏Šฑ ๏Šง ๏Šจ
  • B 2 . 3 ร— 1 0 ๏Šฑ ๏Šฉ
  • C 7 . 7 ร— 1 0 ๏Šฑ ๏Šฉ
  • D 4 . 3 ร— 1 0 ๏Šฑ ๏Šง ๏Šจ
  • E 4 . 0 ร— 1 0 ๏Šฑ ๏Šฎ

Q2:

An aqueous solution has an initial N H 3 concentration of 0.115 M and an initial C H N H 6 5 2 concentration of 0.100 M. The ๐พ b of N H 3 is 1 . 8 ร— 1 0 โˆ’ 5 , the ๐พ b of C H N H 6 5 2 is 4 . 6 ร— 1 0 โˆ’ 1 0 , and the self-ionization of water, ๐พ w , is 1 . 0 ร— 1 0 โˆ’ 1 4 . Calculate to 2 significant figures the concentration of C H N H 6 5 3 + at equilibrium.

  • A 0.14 M
  • B 0.10 M
  • C 6 . 9 ร— 1 0 โˆ’ 1 2 M
  • D 3 . 2 ร— 1 0 โˆ’ 8 M
  • E 1 . 4 ร— 1 0 โˆ’ 3 M

Q3:

A solution has an initial H N O 2 concentration of 0.134 M and an initial H B r O concentration of 0.120 M. The ๐พ a of H N O 2 is 4 . 5 0 ร— 1 0 โˆ’ 4 and the ๐พ a of H B r O is 2 . 0 0 ร— 1 0 โˆ’ 9 . Calculate the equilibrium concentration of B r O โ€“ in the solution at equilibrium.

  • A 3 . 5 5 ร— 1 0 โˆ’ 8 M
  • B 3 . 0 9 ร— 1 0 โˆ’ 8 M
  • C 3 . 7 6 ร— 1 0 โˆ’ 8 M
  • D 3 . 1 8 ร— 1 0 โˆ’ 8 M
  • E 3 . 6 5 ร— 1 0 โˆ’ 8 M