<u>Given:</u>
Concentration of NaClO = 0.037 M
ka (HClO) = 4.0*10⁻⁸
<u>To determine:</u>
The pH of the NaClO solution
<u>Explanation:</u>
The hydrolysis of the weak base can be represented by the ICE table shown below-
ClO- + H2O ↔ HClO + OH-
Initial 0.037M 0 0
Change -x +x +x
Equilibrium (0.037-x) x x
kb = kw/ka = [HClO][OH-]/[ClO-]
10⁻¹⁴/4*10⁻⁸ = x²/(0.037-x)
x = [OH-] = 9.62*10⁻⁵
p[OH-] = -log[OH-] = -log [9.62*10⁻⁵] = 4.02
pH = 14-p[OH-] = 14 - 4.02 = 9.98
Ans: pH of the solution is 9.98
<u>Answer:</u> The correct answer is Potassium-39, Potassium-40, Potassium-41
<u>Explanation:</u>
Atomic number is defined as the number of protons present in an atom.
Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.
A = Mass number = Number of neutrons + Number of protons.
For the given isotopes of potassium:
Atomic number of potassium is 19.
<u>For potassium-41 isotope:</u>
Mass number = 41
Number of neutrons = 41 - 19 = 22
<u>For potassium-39 isotope:</u>
Mass number = 39
Number of neutrons = 39 - 19 = 20
<u>For potassium-40 isotope:</u>
Mass number = 40
Number of neutrons = 40 - 19 = 21
The most number of neutrons are in potassium-41 isotope and the least number of neutrons are in potassium-39
Hence, the correct answer is Potassium-39, Potassium-40, Potassium-41
I think the correct answer from the choices listed above is option B. The formation of frost on a cold windowpane is an example of condensation. This process involves the phase change from the vapor phase to the liquid phase.
Temperature and pressure at the earth's surface are minimal compared to what they are at depth. With sediments, they become converted to rocks or become lithified by burial which subjects them to higher temperature and pressure. If the temperature and pressure become too great, then the sediments will be converted to metamorphic rocks. Basically the rocks or sediments are changing in order to be in equilibrium with the new conditions.
