From the given problem statement having three salts NaX (X=A, B or C) , Which ( X - ) has the weakest conjugate acid has to be explained. The three X - anions has to be arranged in the order of decreasing base strength Concept Introduction: Base ionization constant K b The equilibrium expression for the ionization of weak base B will be, B (aq) +H 2 O (l) → HB + (aq) +OH - (aq) K b = [ HB + ] [ OH - ] [ B ] Where K b is base ionization constant, [ OH − ] is concentration of hydroxide ion, [ HB + ] is concentration of conjugate acid, [ B] is concentration of the base Relationship between K a and K b K a × K b = K w Where, K w is autoionization of water. The autoionization of water : K w = [ H + ] [ OH - ] = 1.0 × 10 − 14 In general, there is a reciprocal relationship between the strength of an acid or base and the strength of its conjugate. To Explain: Which ( X - ) has the weakest conjugate acid. The three X - anions in the order of decreasing base strength
From the given problem statement having three salts NaX (X=A, B or C) , Which ( X - ) has the weakest conjugate acid has to be explained. The three X - anions has to be arranged in the order of decreasing base strength Concept Introduction: Base ionization constant K b The equilibrium expression for the ionization of weak base B will be, B (aq) +H 2 O (l) → HB + (aq) +OH - (aq) K b = [ HB + ] [ OH - ] [ B ] Where K b is base ionization constant, [ OH − ] is concentration of hydroxide ion, [ HB + ] is concentration of conjugate acid, [ B] is concentration of the base Relationship between K a and K b K a × K b = K w Where, K w is autoionization of water. The autoionization of water : K w = [ H + ] [ OH - ] = 1.0 × 10 − 14 In general, there is a reciprocal relationship between the strength of an acid or base and the strength of its conjugate. To Explain: Which ( X - ) has the weakest conjugate acid. The three X - anions in the order of decreasing base strength
Solution Summary: The author explains the equilibrium expression for the ionization of weak base B.
From the given problem statement having three salts
NaX(X=A,Bor C),
Which (
X-) has the weakest conjugate acid has to be explained.
The three
X- anions has to be arranged in the order of decreasing base strength
Concept Introduction:
Base ionization constant
Kb
The equilibrium expression for the ionization of weak base
B will be,
B(aq)+H2O(l)→HB+(aq)+OH-(aq)
Kb=[HB+][OH-][B]
Where
Kb is base ionization constant,
[OH−] is concentration of hydroxide ion,
[HB+] is concentration of conjugate acid,
[B] is concentration of the base
Relationship between
Ka and
Kb
Ka×Kb=Kw
Where,
Kw is autoionization of water.
The autoionization of water:Kw=[H+][OH-]=1.0×10−14
In general, there is a reciprocal relationship between the strength of an acid or base and the strength of its conjugate.
To Explain:
Which (
X-) has the weakest conjugate acid.
The three
X- anions in the order of decreasing base strength
Arrange the solutions in order of increasing acidity. (Note that K (HF) = 6.8 x 10 and K (NH3) = 1.8 × 10-5)
Rank solutions from least acidity to greatest acidity. To rank items as equivalent, overlap them.
▸ View Available Hint(s)
Least acidity
NH&F NaBr NaOH
NH,Br NaCIO
Reset
Greatest acidity
1. Consider the following molecular-level diagrams of a titration.
O-HA molecule
-Aion
°°
о
°
(a)
о
(b)
(c)
(d)
a. Which diagram best illustrates the microscopic representation for the
EQUIVALENCE POINT in a titration of a weak acid (HA) with sodium.
hydroxide?
(e)
Answers to the remaining 6 questions will be hand-drawn on paper and submitted as a single
file upload below:
Review of this week's reaction:
H₂NCN (cyanamide) + CH3NHCH2COOH (sarcosine) + NaCl, NH4OH, H₂O --->
H₂NC(=NH)N(CH3)CH2COOH (creatine)
Q7. Draw by hand the reaction of creatine synthesis listed above using line structures without showing
the Cs and some of the Hs, but include the lone pairs of electrons wherever they apply. (4 pts)
Q8. Considering the Zwitterion form of an amino acid, draw the Zwitterion form of Creatine. (2 pts)
Q9. Explain with drawing why the C-N bond shown in creatine structure below can or cannot rotate. (3
pts)
NH2(C=NH)-N(CH)CH2COOH
This bond
Q10. Draw two tautomers of creatine using line structures. (Note: this question is valid because problem
Q9 is valid). (4 pts)
Q11. Mechanism. After seeing and understanding the mechanism of creatine synthesis, students should
be ready to understand the first half of one of the Grignard reactions presented in a past…
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