Answer:
As heat is applied to liquid water, the molecules move faster and the temperature again increases. During the phase change from liquid to gas, the added heat is stored in the molecules as, once again, potential energy, and the temperature remains constant.
Explanation:
Ca(OH)₂: strong base
pOH = a . M
a = valence ( amount of OH⁻)
M = concentration
Ca(OH)₂ ⇒ Ca²⁺ + 2OH⁻ (2 valence)
so:
pOH = 2 x 0.005
pOH = 0.01
pH = 14 - 0.01 = 13.99
Answer: Precipitates form only in (b) (c) and (d) and these are
,
and NiS respectively.
Explanation: (a) The reaction will be:

The reaction will not take place as both the products are soluble and so no precipitate will form.
(b) The reaction will be:

This reaction will take place as aluminum hydroxide is insoluble. So, the precipitate formed in this reaction is
.
(c) The reaction will be:

This reaction will take place as a precipitate of calcium sulfate(slightly soluble) will form.
(d) The reaction will be:

This reaction will take place as NiS is insoluble. So, the precipitate formed in this reaction is NiS.
Explanation:
is the Iodite ion. The ion has a total of 7+6(2)+1 = 20 electrons. The Iodite ion, or iodine dioxide anion, is the halite with the chemical formula IO−
2. Within the ion the Iodine exists in the oxidation state of +3. The hybridization state of central atom I in Iodite ion is
.