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Answer: False</h3>
In solid form, ionic compounds do not conduct electricity. Ionic compounds will conduct electricity when melted to their liquid state. This is due to the electrons being locked in place when in solid form, but liquid form allows for the electrons to move freely.
A) deposition is the processes where particles of rock or laid down in sections with heavier sediments building up first
When the solubility is the amount of solute that dissolved in a unit volume of the solvent.
and when the balanced reaction equation is:
so, by using the ICE table:
Cd(OH)2(s) ↔ Cd2+ + 2OH-
initial 0 0
change +X +2X
Equ X 2X
so the Ksp expression = [Cd2+] [OH-]^2
and we have Ksp = 7.2 x 10^-15
and when we assume the solubility = X
by substitution:
7.2 x 10^-15 = (X) (2X)^2
7.2 x 10^-15 = X*4X^2
7.2 x 10^-15 = 4X^3
∴X = ∛(7.2x10^-15)/4
= 1.22 x 10^-5 M
∴ the solubility = X = 1.22 x 10^-5 M
1) Endothermic reactions:
a) The reaction between ammonium nitrate and water absorbs heat from the surrounding environment.
There are two types of reaction: endothermic reaction (chemical reaction that absorbs more energy than it releases) and exothermic reaction (chemical reaction that releases more energy than it absorbs).
b) Ammonium chloride dissolved in a beaker of water makes the beaker cold.
Dissolving this salt absorbs heat from beaker.
c) Water separates on hydrogen and oxygen when an electric current is run through it.
Electrolysis of water is the decomposition reaction (heat is required), because from one molecule (water) two molecules (hydrogen and oxygen) are produced. Water is separated into two molecules.
2) Exothermic reactions:
a) Three drops of concetrated sulfuric acid added to 100 milliliters in a beaker makes the beaker hot.
Energy is released, beaker absorbs that heat.
b) Uranium atoms are split to produce nuclear energy.
Nuclear energy is released.
c) Methane and oxygen are combined to produce methanol and heat.
Balanced chemical reaction: 2CH₄ + O₂ → 2CH₃OH + heat.
