Question 1
What is
not a characteristic of white phosphorus?
◦ It has a low melting point (44°C).
◦ It bursts into flames when exposed to air, thus it is stored under water.
◦ At temperatures less than 0°C it is converted to red phosphorus.
◦ It is soluble in nonpolar solvent such as carbon disulfide CS
2.
Question 2
What is
not an appropriate method of making phosphoric acid?
◦ PCl
5(
s) + 4 H
2O(
l) → H
3PO
4(
aq) + 5 HCl(
aq)
◦ P
4(
s) + 16 H
2O(
l) → 4 H
3PO
4(
aq) + 2 H
2(
g)
◦ P
4O
10(
s) + 6 H
2O(
l) → 4 H
3PO
4(
aq)
◦ PH
3(
g) + 2 O
2(
g) → H
3PO
4(
l)