The mass of HNO 3 that is present per liter of solution is to be calculated. Concept introduction: Strong acids and strong bases are the substance that dissociates completely into its ions when dissolved in the solution. They dissociate completely in water to release H + ions and OH − ions. Weak acids and weak bases are the substance that does not dissociate completely into its ions when dissolved in the solution. They dissociate partially in water to release H + ions and OH − ions. Molarity ( M ) is one of the concentration terms that determine the number of moles of solute present in per liter of solution. Unit of molarity is mol/L . The mass percent of a compound is the mass of that compound in 100 g of solution.
The mass of HNO 3 that is present per liter of solution is to be calculated. Concept introduction: Strong acids and strong bases are the substance that dissociates completely into its ions when dissolved in the solution. They dissociate completely in water to release H + ions and OH − ions. Weak acids and weak bases are the substance that does not dissociate completely into its ions when dissolved in the solution. They dissociate partially in water to release H + ions and OH − ions. Molarity ( M ) is one of the concentration terms that determine the number of moles of solute present in per liter of solution. Unit of molarity is mol/L . The mass percent of a compound is the mass of that compound in 100 g of solution.
The mass of HNO3 that is present per liter of solution is to be calculated.
Concept introduction:
Strong acids and strong bases are the substance that dissociates completely into its ions when dissolved in the solution. They dissociate completely in water to release H+ ions and OH− ions.
Weak acids and weak bases are the substance that does not dissociate completely into its ions when dissolved in the solution. They dissociate partially in water to release H+ ions and OH− ions.
Molarity (M) is one of the concentration terms that determine the number of moles of solute present in per liter of solution. Unit of molarity is mol/L.
The mass percent of a compound is the mass of that compound in 100g of solution.
(b)
Interpretation Introduction
Interpretation:
The molarity of the solution is to be determined.
Concept introduction:
Strong acids and strong bases are the substance that dissociates completely into its ions when dissolved in the solution. They dissociate completely in water to release H+ ions and OH− ions.
Weak acids and weak bases are the substance that does not dissociate completely into its ions when dissolved in the solution. They dissociate partially in water to release H+ ions and OH− ions.
Molarity (M) is one of the concentration terms that determine the number of moles of solute present in per liter of solution. Unit of molarity is mol/L.
The mass percent of a compound is the mass of that compound in 100g of solution.
Part II. xiao isolated a compound TAD (Ca H 10 N₂) from tobacco and obtained its IR spectrum. Xiao proposed
a chemical structure shown below:
% Transmittance
4000
3500
3000
2500 2000
Wavenumber (cm-1)
1500
1000
(a) Explain why her proposed structure is inconsistent with the IR spectrum obtained
(b) TAD exists as a tautomer of the structure xiao proposed. Draw the structure
and explain why it is more compatible with the obtained spectrum.
(C) what is the possible source for the fairly intense signal at
1621cm1
AE>AE₁ (Y/N)
AE=AE₁ (Y/N)
AE
Treatment of 2-phenylpropan-2-amine with methyl 2,4-dibromobutanoate in the presence of a nonnucleophilic base, R3N, involves two successive SN2 reactions and
gives compound A.
?
NH2
Br
Br
Propose a structural formula for compound A.
You do not have to explicitly draw H atoms.
You do not have to consider stereochemistry.
In cases where there is more than one answer, just draw one.
R3N
C14H19NO2
+ 2 R3NH*Br
A
Chapter 4 Solutions
Chemistry: The Molecular Nature of Matter and Change - Standalone book