Answer: pH of the given solution is 8.7.
Explanation:
For the buffer mixture, initial pOH will be given as follows.
pOH =
=
=
= 5.523
When 0.05 mol NaOH is added to this buffer solution then concentration of species present will be as follows.
0.05 mol 0.25 0.75 0
0 0.20 (0.75 + 0.25) 0.05
Hence, the volume of solution will be 1 liter.
[BOH] = , [Salt] =
So, pOH = [/tex]
= 6 - 0.69
= 5.30
Now, we will calculate the pH as follows.
pH = 14 - 5.30
= 8.7
Thus, we can conclude that pH of the given solution is 8.7.
<span>Solvent is ethyl alcohol.
hope this helps!</span>
Answer:
77.58g/mol
Explanation:
Let the rate of effusion of NO2 be R1
The rate of effusion of the unknown gas(R2) = 0.770R1
Molar Mass of NO2 (M1) = 14 + (2x16) = 14 + 32 = 46g/mol
The molar mass of the unknown gas (M2) =?
R1/R2 = √(M2/M1)
R1/0.770R1 = √(M2/46)
1/0.770 = √(M2/46)
Take the square of both sides
(1/0.770)^2 = M2/46
Cross multiply to express in linear form
M2 = (1/0.770)^2 x 46
M2 = 77.58g/mol
The molar mass of the unknown gas is 77.58g/mol
Answer:
Strength
Explanation:
Lattice energy is the energy needed to remove one mole of ionic substance to its gaseous ion.
The lattice energy is used to determine the strength of a substance.
- Lattice energy increases as the size of an ion decreases.
- It decreases as the ion size increases.
- This quantity is often determined using electrostatics method in the laboratory
- The lattice energy is used to break an ionic solid to form a gaseous compound.