Considering the definition of pOH and strong base, the pOH of the aqueous solution is 1.14
The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution and indicates the concentration of ion hydroxide (OH-).
pOH is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:
pOH= - log [OH⁻]
On the other hand, a strong base is that base that in an aqueous solution completely dissociates between the cation and OH-.
LiOH is a strong base, so the concentration of the hydroxide will be equal to the concentration of OH-. This is:
[LiOH]= [OH-]= 0.073 M
Replacing in the definition of pOH:
pOH= -log (0.073 M)
<u><em>pOH= 1.14 </em></u>
In summary, the pOH of the aqueous solution is 1.14
Learn more:
The correct answer is internal.
A solid substance whose components like molecules, atoms, or ions are aligned in a highly ordered microscopic composition producing a crystal lattice, which extends in all the directions is known as a crystalline solid or a crystal.
On the other hand, the noncrystalline solid substance in which the atoms and molecules are not aligned in a definite lattice pattern is known as an amorphous solid. Such solids comprise plastic, glass, and gel.
Answer:
(a) ¹⁴₆ C ⇒ ¹⁴₇ N + ⁰₋₁ e
(b) ¹⁴⁰₅₅ Cs ⇒ ¹⁴⁰₅₆ Ba + ⁰₋₁ e
(c) ²³⁴₉₀ Th ⇒ ²³⁴₉₁ Pa + ⁰₋₁ e
Explanation:
In a beta decay the nuclide emits a beta particle which are high enery electrons. The number of neutrons decreases by one and the atomic number increases also by one moving the nuclide one place to the right in the periodic table. The mass of the nuclide does not change since the mass of electron is negligible compared to the proton and neutron.
(a) ¹⁴₆ C ⇒ ¹⁴₇ N + ⁰₋₁ e
(b) ¹⁴⁰₅₅ Cs ⇒ ¹⁴⁰₅₆ Ba + ⁰₋₁ e
(c) ²³⁴₉₀ Th ⇒ ²³⁴₉₁ Pa + ⁰₋₁ e
The number of atoms in a molecule can be calculated by adding all of the number of elements from the chemical formula. For chlorophyll, the chemical formula would be <span>C55H72MgN4O5 adding all the elements we have 137 atoms. Hope this answers the question.</span>
