past lab 3 - saldana(avs387 Post-lab 3 Lyon(90255 This...

saldana (avs387) – Post-lab 3 – Lyon – (90255) 1
This print-out should have 9 questions.
Multiple-choice questions may continue on
the next column or page – find all choices
before answering.
001 (part 1 of 2) 10.0 points
Identify the correct net ionic equation for the
formation of copper (II) phosphate precipi-
tate from solution.
1. 2 Co
2+
(aq) + PO
3 -
4
(aq) →
Co
2
PO
4
(s)
2. 3 Cu
2+
(aq) + 2 PO
3 -
4
(aq) →
Cu
3
(PO
4
)
2
(s)
3. 2 Cu
2+
(aq) + PO
3 -
4
(aq) →
Cu
2
PO
4
(s)
4. Cu
2+
(aq) + PO
3 -
4
(aq) →
Cu
3
(PO
4
)
2
(s)
5. Cu
+
(aq) + PO
-
4
(aq) → CuPO
4
(s)
6. 2 Cu
2+
(aq) + P3 - (aq) → Cu
3
P
2
(s)
7. 3 Co
2+
(aq) + 2 PO
3 -
4
(aq) →
Co
3
(PO
4
)
2
(s)
002 (part 2 of 2) 10.0 points
Identify the correct net ionic equation for the
formation of tin (IV) sulfide precipitate from
solution.
1. Sn
4+
(aq) + 2 S
2 -
(aq) → SnS
2
(s)
2. Ti
4+
(aq) + 2 S
2 -
(aq) → TiS
2
(s)
3. 4 Sn
2+
(aq) + 4 S
2 -
(aq) → 4 SnS (s)
4. 4 Sn
4+
(aq) + 2 S
2 -
(aq) → 2 Sn
2
S (s)
5. 2 Ti
2+
(aq) + S
2 -
(aq) → TiS (s)
003 (part 1 of 4) 10.0 points
In each of the following four situations,
imagine that you have two unlabeled beakers