Answer:
1.01 V
Explanation:
From Nernst equation;
Ecell= E°cell- 0.0592/n log Q
Where;
Ecell= observed emf of the cell
E°cell= standard emf of the cell
n= number of moles of electrons transferred
Q= reaction quotient
Q= [Ag^+]^3/[MnO4^-] [H^+]^4
Q= [0.01]^3/[1.20] [1.50]^4
Q= 1.65×10^-7
Ecell= 0.88 - 0.0592/3 log 1.65×10^-7
Ecell= 0.88 - [0.0197×(-6.78)]
Ecell= 0.88 + 0.134
Ecell= 1.01 V
Here is the full question
How many moles of sodium acetate must be added to 2.0 L of 0.10 M acetic acid to give a solution that has a pH equal to 5.00? Ignore the volume change due to the addition of sodium acetate. Ka of acetic acid is 1.7×10-5.
Answer:
0.3396 moles
Explanation:
pH = pKA + log
[acetic acid] = 0.1 M
pH = 5.0
=
5.0 = -log () + log
5.0 = 4.77 + log [acetate] + 1
5.0 = 5.77 + log [acetate]
- log [acetate] = 5.77 - 5.0
- log [acetate] = 0.77
log [acetate] = -0.77
[acetate] = log⁻¹ (-0.77)
[acetate] = 0.1698
∴ for 2L = 2 × 0.1698
= 0.3396 moles
<h2>
Hello!</h2>
The answer is: Charle's Law.
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Why?</h2>
The law that states that the volume and absolute temperature of a fixed quantity of gas (ideal gas) are proportional under constant pressure is the Charle's Law, also known as the law of volumes.
The law describes how a gas kept under constant pressure tends to expand when the temperature increases and it's described by the following equation:
Where,
Also, to describe the relationship between two differents volumes at different temperatures, we have:
Where,
Have a nice day!
1) Preliminar explanation:
Atoms are neutral spieces: they have the same number of positive charges (protons inside the nucleous) as of negative charges (electrons around the nucleus).
Ions are formed by the gain or loss of electrons.
Positive ions are formed when neutral the atoms lose electrons, and negative ions are formed when neutral atoms gain electrons. Only the elctrons are gain or loss in ions formation (the number of protons remain unchanged).
2) Conclusion (answer)
Therefore, mathematically an ion is the result of adding or subtracting electrons to an atom, creating an imbalance of charge, positve when the atom ends up with less electrons than protons (loss of electrons) or negative when the atoms ends up with more electrons than protons (gain of electrons).
She said that she had a little bit of a girl and