The formula for potassium sulfide is ________.
Fill in the blank(s) with correct word
Question 2
Which of the following is an oxidation-reduction reaction?
A) Cu (s) + 2AgNO3 (aq) 2Ag (s) + Cu(NO3)2 (aq)
B) HCl (aq) + NaOH (aq) H2O (l) + NaCl (aq)
C) AgNO3 (aq) + HCl (aq) AgCl (s) + HNO3 (aq)
D) Ba(C2H3O2)2 (aq) + Na2SO4 (aq) BaSO4 (s) + 2NaC2H3O2(aq)
E) H2CO3 (aq) + Ca(NO3)2 (aq) 2HNO3 (aq) + CaCO3 (s)
Question 3
Given that O2 is paramagnetic and has a bond order of 2, and its highest occupied molecular orbital is antibonding, what would be the expected bond orders for O22- and O22+?
A) 1 for O22- and 3 for O22+
B) 3/2 for O22- and 5/2 for O22+
C) 5/2 for O22- and 3/2 for O22+
D) 3 for O22- and 1 for O22+
Question 4
The purpose of the salt bridge in an electrochemical cell is to ________.
A) maintain electrical neutrality in the half-cells via migration of ions
B) provide a source of ions to react at the anode and cathode
C) provide oxygen to facilitate oxidation at the anode
D) provide a means for electrons to travel from the anode to the cathode
E) provide a means for electrons to travel from the cathode to the anode
potassium
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A(n) _____ is a spur-of-the-moment question. Fill in the blank(s) with correct word