PRINCIPLES OF INSTRUMENTAL ANALYSIS
7th Edition
ISBN: 9789353506193
Author: Skoog
Publisher: CENGAGE L
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Chapter 5, Problem 5.4QAP
Interpretation Introduction
Interpretation:
The reason for the shielding to be vital in the glass electrodes design having value of an internal resistance
Concept introduction:
Glass electrode act as a chemical sensor, it uses a glass membrane as a surface for sensing. This is opposite to the one that uses a solid-state membrane or an organic membrane. In the glass, a material is present which is sensitive to the material which needs to be measured. Shielding is important when designing glass electrodes.
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What would be the best choices for the missing reagents 1 and 3 in this synthesis?
1
1. PPh3
2. n-BuLi
3
2
• Draw the missing reagents in the drawing area below. You can draw them in any arrangement you like.
• Do not draw the missing reagent 2. If you draw 1 correctly, we'll know what it is.
• Note: if one of your reagents needs to contain a halogen, use bromine.
Click and drag to start drawing a structure.
X
What is the missing reactant R in this organic reaction?
N
N
H3O+
+R
+
• Draw the structure of R in the drawing area below.
• Be sure to use wedge and dash bonds if it's necessary to draw one particular enantiomer.
Click and drag to start drawing a
structure.
fm
The product on the right-hand side of this reaction can be prepared from two organic reactants, under the conditions shown above and below the arrow. Draw 1
and 2 below, in any arrangement you like.
1+2
NaBH3CN
H+
N
Click and drag to start drawing a
structure.
5
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