Why does lead appear in group I and II?
Table of Contents
- 1 Why does lead appear in group I and II?
- 2 Is lead a basic radical?
- 3 Which is the group reagent for Group 2 radicals?
- 4 Why do we use lead II?
- 5 What group or family is lead in?
- 6 What is the group reagent of 1st group?
- 7 Which group reagent is used for the first group of basic radicals?
- 8 Which out of following reagents is a group reagent for First Group radical analysis?
- 9 What are the steps involved in analysis of basic radicals?
- 10 How to separate the cations of basic radicals?
- 11 Why is lead sulphide placed in the 2nd group of precipitate?
Why does lead appear in group I and II?
One reason for putting lead in both groups is that the chloride is somewhat of a borderline case in terms of being insoluble enough to appear in Group I. Group II represents a more complicated analysis but is more sensitive for lead.
Is lead a basic radical?
The lead radical is among the first group of basic radicals in which hydrochloric acid is used as group reagents.
What are the groups of basic radicals?
Qualitative Analysis : ANALYSIS OF BASIC RADICALS Introduction
| S.No. | Group | Basic radical |
|---|---|---|
| 1. | Zero group | NH4+ |
| 2. | I group | (i) Pb2+ (ii) Ag+ (iii) Hg22+ |
| 3. | II group | (A) Cu-sub group (i) Hg2+ (ii) Pb2+ (iii) Bi3+ (iv) Cu2+ (v) Cd2+ (B) As-sub-group (i) As3+ (ii) Sb3+ (iii) Sn2+ (iv) Sn4+ |
| 4. | III group | (i) AI3+ (ii) Fe3+ (iii) Cr3+ |
Which is the group reagent for Group 2 radicals?
Group reagent for the precipitation of group 2 basic radicals for the qualitative $dil. \text{ }HCl+{{H}_{2}}S$ in group II to sulphide, precipitated in acidic medium. So, the correct answer is “Option A”.
Why do we use lead II?
To assess the cardiac rhythm accurately, a prolonged recording from one lead is used to provide a rhythm strip. Lead II, which usually gives a good view of the P wave, is most commonly used to record the rhythm strip.
In what period is lead?
6
Fact box
| Group | 14 | Melting point |
|---|---|---|
| Period | 6 | Boiling point |
| Block | p | Density (g cm−3) |
| Atomic number | 82 | Relative atomic mass |
| State at 20°C | Solid | Key isotopes |
What group or family is lead in?
Group 14
lead (Pb), a soft, silvery white or grayish metal in Group 14 (IVa) of the periodic table. Lead is very malleable, ductile, and dense and is a poor conductor of electricity.
What is the group reagent of 1st group?
. The reagent for Group 1 anions is dilute hydrochloric acid (HCl) or dilute sulfuric acid (H2SO4).
How are basic radicals divided into groups?
Basic radicals (cations) have been divided into groups based on Ksp values.
Which group reagent is used for the first group of basic radicals?
H2S.
Which out of following reagents is a group reagent for First Group radical analysis?
The group reagent is ammonium hydroxide in the presence of ammonium chloride.
Where is lead acetate used?
The commercial form of lead acetate, lead acetate trihydrate, is used as a mordant in textile printing and dyeing, as a lead coating for metals, as a drier in paints, varnishes, and pigment inks, and as a colorant in hair dyes (IARC, 1980; Sittig, 1985; Sax, 1987).
What are the steps involved in analysis of basic radicals?
Analysis of basic radicals: Analysis of basic radicals involves following steps: (i) Preparation of aqueous solution or original solution. (ii) Separation of basic radicals in different groups.
How to separate the cations of basic radicals?
The original solution prepared for analysis of basic radicals is treated with specific reagents (known as group reagent) to separate the cations. On the basis of salt precipitated, all the salts have been classified into zero to VI gp. Cations of each group can be precipitated by specific group reagent. 1. 2.
What are some examples of Group II radicals?
Group-II (Cu2+, Cd2+, Pb2+, Hg2+ (II), Bi3+, As3+, Sb3+, Sn2+) treated with H2S (g) + dil. HCl Thanks for the question. Even my answer pertains only to the qualitative analysis of basic radicals.
Why is lead sulphide placed in the 2nd group of precipitate?
The metal ions remaining in solution are precipitated as insoluble lead sulphide on passing H2S into the filtrate (in the 2nd group). Since lead is not completely precipitated by HCl in the 1st group, it is placed in both the groups.
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