Multiple Choice
Which of the following correctly identifies the polyatomic ion present in manganese(II) sulfite (MnSO3) and manganese(II) sulfate (MnSO4)?
93
views
3. Chemical Reactions
Polyatomic Ions
Multiple Choice
Which of the following is the conjugate base of the dihydrogen phosphate ion, H2PO4-?
A
HPO4^{2-}
B
H3PO4
C
H2PO3^{-}
D
PO4^{3-}
Verified step by step guidance1
Recall that a conjugate base is formed when an acid loses a proton (H\(\textsuperscript{+}\)).
Identify the given species: the dihydrogen phosphate ion is H2PO4\(\textsuperscript{-}\), which can act as an acid by donating one proton.
Remove one proton (H\(\textsuperscript{+}\)) from H2PO4\(\textsuperscript{-}\) to find its conjugate base. This means subtracting one H\(\textsuperscript{+}\) and reducing the charge by one unit.
Write the formula of the conjugate base after losing one proton: H2PO4\(\textsuperscript{-}\) \(\rightarrow\) HPO4\(\textsuperscript{2-}\).
Compare the options given and select the species that matches the formula HPO4\(\textsuperscript{2-}\), which is the conjugate base of H2PO4\(\textsuperscript{-}\).
Related Videos
Related Practice
