Answer:
The correct answer is The equilibrium constant for this reaction changes as the pH changes.
Explanation:
The equilibrium constant of a reaction depends of pH and viceverca.There is a equation that link pH with equilibrium constant Ka(for assumption).The equation is given below,
pH=pKa+log[A-/HA]
where[A-] is the concentration of conjugate base and [HA] is the concentration of conjugate acid.
<h3><u>Answer;</u></h3>
Fe2+(aq) + 2OH(aq) ----> Fe(OH)2(s)
<h3><u>Explanation;</u></h3>
We first write down the balanced equation for this reaction:
FeCl₂(aq) + 2NaOH(aq) → 2 NaCl(aq) + Fe(OH)₂(s)
This is a precipitation reaction, where two soluble salts are mixed together in solution forms to make a precipitate.
Then,we can now write the ionic equation for this reaction, that is:
Fe²⁺(aq) + 2Cl⁻(aq) + 2 Na⁺(aq) + 2OH⁻ (aq) → 2 Na⁺(aq) + 2Cl⁻(aq) + Fe(OH)₂(s)
Now, we need to cancel the spectator ions, which are ions that are present on both sides in the equation.
So, the equation becomes;
Fe2+(aq) + 2OH(aq) ----> Fe(OH)2(s)
Answer : The atom with the same number of neutrons as
is, ![^{11}B](https://tex.z-dn.net/?f=%5E%7B11%7DB)
Explanation :
- The given atom is,
![^{12}C](https://tex.z-dn.net/?f=%5E%7B12%7DC)
Atomic mass number = 12
Atomic number = 6
Atomic number = Number of protons = Number of electrons = 6
Number of neutrons = Atomic mass number - Atomic number = 12 - 6 = 6
Now we have to determine the number of neutrons in the given options.
- In atom,
![^{9}Be](https://tex.z-dn.net/?f=%5E%7B9%7DBe)
Atomic mass number = 9
Atomic number = 4
Atomic number = Number of protons = Number of electrons = 4
Number of neutrons = Atomic mass number - Atomic number = 9 - 4 = 5
- In atom,
![^{11}B](https://tex.z-dn.net/?f=%5E%7B11%7DB)
Atomic mass number = 11
Atomic number = 5
Atomic number = Number of protons = Number of electrons = 5
Number of neutrons = Atomic mass number - Atomic number = 11 - 5 = 6
- In atom,
![^{13}C](https://tex.z-dn.net/?f=%5E%7B13%7DC)
Atomic mass number = 13
Atomic number = 6
Atomic number = Number of protons = Number of electrons = 6
Number of neutrons = Atomic mass number - Atomic number = 13 - 6 = 7
- In atom,
![^{14}N](https://tex.z-dn.net/?f=%5E%7B14%7DN)
Atomic mass number = 14
Atomic number = 7
Atomic number = Number of protons = Number of electrons = 7
Number of neutrons = Atomic mass number - Atomic number = 14 - 7 = 7
Therefore, the atom with the same number of neutrons as
is, ![^{11}B](https://tex.z-dn.net/?f=%5E%7B11%7DB)
<h3><u>Answer;</u></h3>
= 4.81 × 10^22 particles
<h3><u>Explanation</u>;</h3>
The molar mass of Cr2(SO3)3 is 344.18 g
1 mole of a substance contains 6.02 10^23 particles
But; 1 mole of chromium (iii) sulfite = 344.18 g
Therefore;
344.18 g = 6.02×10^23 particles
27.5 g = ?
Hence;
= (27.5 × 6.02 × 10^23)/344.18
<h3><u>= 4.81 × 10^22 particles </u></h3>
Answer:
The equilibrium consntant expression is:
Keq= (02) x (H2)^2/(H20)^2
Explanation:
The equilibrium constant is calculated as the ratio between products and reagents raised to their stoichiometric coefficients. In this case, Water (H20) is a reagent and the respective products are Hydrogen (H2) and Oxygen (02)