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Descriptive inorganic chemistry questions.

Descriptive inorganic chemistry questions.

Find Descriptive inorganic chemistry university examination questions in acaproso.com

# Question
1

The combination of ligand(s) with a metal cation is often called a coordination complex.


True OR False
2

Al(OH)_3  is not an amphoteric hydroxide, while Fe(OH)_3 is an amphoteric hydroxide.


True OR False
3

An amphoteric substance is one that can behave as a Lewis base and a Bronstead acid.


True OR False
4

The presence of a transition metal in a complex often leads to highly coloured complexes.


True OR False
5

Determination of total alkalinity in the given sample water from the Indian Ocean

Procedure:

  1. 30cm3 of water sample water from the Indian Ocean was pipetted into the 250 cm3 conical flask.
  2. Three drops of phenolphthalein indicator solution was added to the conical flask. The colour of the solution changed to pink.
  3. Then the sample was titrated against 0.02N sulphuric acid solution till the pink colour changed to colourless,
  4. To the same solution in the conical flask, three drops of the mixed indicator solution was added, the colour of the solution changed to blue colour.
  5. The water sample from the Indian Ocean was then titrated against 0.02 N sulphuric acid solution till the solution changed to yellow.
Sample Name Exp.No Burette reading Phenolphthalein indicator solution Volume used in cm3 Burette reading mixed indicator solution Volume used cm3
Initial volume cm3 Final volume cm3 Initial volume cm3 Final volume cm3
Water sample from the Indian Ocean (i) 0.40 20.40   22.30 28.70  
(ii) 24.30 44.50   10.40 16.60  

Answer questions number (i) - (iii) provided below

Calculate

  1. Concentration of hydroxide ion (OH-) in milligram per dm3. present in the water sample from the Indian Ocean.
  2. Concentration of carbonate ion and bicarbonate ion CO_3^{2-} and HCO_3^{-} in milligram per dm3 present in the water sample from the Indian Ocean.
  3. Total alkalinity of the water from the Indian Ocean in milligram per litre.

Practical
6

A solution contain two of the Group I cations. A white precipitate forms on addition of 6M HCl. The precipitate is insoluble in hot water; the residure dissolves on addition of 6 M NH3.

  1. Which of the ions are present?
  2. Which are absent?
  3. Which remain undetermined ? Explain your reasoning . If any cations remain undetermined, what reaction could you perform to confirm?

Short answers
7

Write an ionic and net ionic equation fo the following reaction between Hg_2^{2+} and HCl.


Short answers
8

Write a balanced equation for the precipitation of nickel (II) hydroxide when NaOH_{(aq)} is added to Ni^{2+}_{(aq)}.


Short answers
9

Write a balanced equation to show that the complex ion [Ni(NH_3)_6]^{2+}is formed when NH_3 is added to aqueous nickel(II) ion, [Ni(H_2O)_6]^{2+}.


Short answers
10

Briefly explain the relationship between the as common phenomena in organic compounds.

  1. Polarization, covalency and solubility of inorganic compounds
  2. Charge density, hydration and conductivity of ions.

Short answers