(a) Interpretation: The pH value for the given condition needs to be determined. Concept introduction: The scale is used to determine the acidity and basic nature of a water-based solution. Lower pH is observed in acidic solution while basic solutions contain a higher pH value. For example: The nature of pure water at room temperature ( 25°C or 77°F ) is neither basic nor acidic. The pH value of pure water is 7 .
(a) Interpretation: The pH value for the given condition needs to be determined. Concept introduction: The scale is used to determine the acidity and basic nature of a water-based solution. Lower pH is observed in acidic solution while basic solutions contain a higher pH value. For example: The nature of pure water at room temperature ( 25°C or 77°F ) is neither basic nor acidic. The pH value of pure water is 7 .
The pH value for the given condition needs to be determined.
Concept introduction:
The scale is used to determine the acidity and basic nature of a water-based solution. Lower pH is observed in acidic solution while basic solutions contain a higher pH value.
For example:
The nature of pure water at room temperature (25°C or 77°F) is neither basic nor acidic. The pH value of pure water is 7.
Interpretation Introduction
(b)
Interpretation:
The pH value for the given condition needs to be determined.
Concept introduction:
The scale is used to determine the acidity and basic nature of a water-based solution. Lower pH is observed in acidic solution while basic solutions contain a higher pH value.
For example:
The nature of pure water at room temperature (25°C or 77°F) is neither basic nor acidic. The pH value of pure water is 7.
Interpretation Introduction
(c)
Interpretation:
The pH value for the given condition needs to be determined.
Concept introduction:
The scale is used to determine the acidity and basic nature of a water-based solution. Lower pH is observed in acidic solution while basic solutions contain a higher pH value.
For example:
The nature of pure water at room temperature (25°C or 77°F) is neither basic nor acidic. The pH value of pure water is 7.
Interpretation Introduction
(d)
Interpretation:
The pH value for the given condition needs to be determined.
Concept introduction:
The scale is used to determine the acidity and basic nature of a water-based solution. Lower pH is observed in acidic solution while basic solutions contain a higher pH value.
For example:
The nature of pure water at room temperature (25°C or 77°F) is neither basic nor acidic. The pH value of pure water is 7.
с.
d.
СнЗ
Сизена=-4=4
Cla
H
Eget3
над
f.
e.
H-C=C-CH3 + 285 →
H-C=C-CH3+2не
H-C=C-CH3 + Nanta»
g+ CH₂ CH₂-G = G-C₁₂-G=CH₂ + 2HI→
H H
H
AL
The IR (infrared) spectra of two pure compounds (0.010 M compound A in solvent and 0.010 M compound B in solvent) are
given. The pathlength of the cell is 1.00 cm. The y-axis in the spectra is transmittance rather than absorption, so that the
wavenumbers at which there is a dip in the curve correspond to absorption peaks.
A mixture of A and B in unknown concentrations gave a percent transmittance of 49.8% at 2976 cm¹ and 44.9% at 3030 cm-1
Wavenumber
0.010 M A
0.010 M B
Unknown
3030 cm-1
35.0%
93.0%
44.9%
2976 cm-¹
76.0%
42.0%
49.8%
What are the concentrations of A and B in the unknown sample?
Transmittance (%)
100
90
80
70
60
50
40
2976 cm-1
30
3030 cm-1
20
Pure A
10
Pure B
0
3040
2990
Wavenumber (cm-1)
2940
2890
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