Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

Or go directly to:

Class notes Holiday assignments Topical questions Other resources

Describe the action of aqueous ammonia on solution of metallic salts.

Answers

(i). Procedure:
- To about 2cm3 of solutions containing ions of calcium, magnesium, aluminium, zinc, iron, lead, copper etc in separate test tubes; aqueous ammonia is added dropwise till in excess.

(ii). Observations:
The various metal ions reacted as summarized in the table below.

(iii). Explanations:
- Most metal ions in solution react with ammonia solution to form insoluble metal hydroxides.
- In excess ammonia, some of the so formed hydroxides dissolve forming complex ions.

(iv). Equations:

Note:
Zn²⁺_(aq) and Cu²⁺_(aq) dissolve in excess ammonia solution forming complex ions.

Kavungya answered the question on March 5, 2019 at 10:33

Answer Attachments

Next: What is the relationship between threads and processes?

Previous: Compare and contrast Multiprogramming, Multitasking and Multiprocessing

View more Chemistry Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

Describe the preparation of ammonium solution. (Solved)

Describe the preparation of ammonium solution.

Date posted: March 5, 2019 . Answers (1)
Explain the action of heat on nitrates. (Solved)

Explain the action of heat on nitrates.

Date posted: March 5, 2019 . Answers (1)
State the observation made in the combustion tube during preparation of ammonia (Solved)

State the observation made in the combustion tube during preparation of ammonia

Date posted: February 21, 2019 . Answers (1)
Calculate the molar enthalpy of formation of carbon(II)oxide (CO) given : ?H?c of carbon-graphite = -393.5kJmole^-1, ?H?c of carbon(II)oxide (CO)= -283 kJmole^-1 (Solved)

Calculate the molar enthalpy of formation of carbon(II)oxide (CO) given : ΔHᶿc of carbon-graphite = -393.5kJmole^-1, ΔHᶿc of carbon(II)oxide (CO)= -283 kJmole^-1

Date posted: February 20, 2019 . Answers (1)
Calculate the molar enthalpy of formation of methane (CH4) given that ?H?c of carbon-graphite is -393.5kJmole^-1,Hydrogen is -285.7 kJmole^-1 and that of methane is 890... (Solved)

Calculate the molar enthalpy of formation of methane (CH4) given that ΔHᶿc of carbon-graphite is -393.5kJmole^-1,Hydrogen is -285.7 kJmole^-1 and that of methane is 890 kJmole^-1

Date posted: February 20, 2019 . Answers (1)
Place 20cm³ of 0.2M copper(II)sulphate (VI) solution into a calorimeter/50cm³ of plastic beaker wrapped in cotton wool/tissue paper. Record its temperature at time T= 0. Stir the... (Solved)

Place 20cm³ of 0.2M copper(II)sulphate (VI) solution into a calorimeter/50cm³ of plastic beaker wrapped in cotton wool/tissue paper.
Record its temperature at time T= 0.
Stir the solution with the thermometer carefully and continue recording the temperature after every 30 seconds .
Place all the (1.5g) Zinc powder provided.
Stir the solution with the thermometer carefully and continue recording the temperature after every 30 seconds for five minutes.
Determine the highest temperature change to the nearest 0.5^oC

Answer the questions below

Date posted: February 20, 2019 . Answers (1)
The molar enthalpy of neutralization was experimentary shown to be 51.5kJ per mole of 0.5M hydrochloric acid and 0.5M sodium hydroxide. If the volume of... (Solved)

The molar enthalpy of neutralization was experimentary shown to be 51.5kJ per mole of 0.5M hydrochloric acid and 0.5M sodium hydroxide. If the volume of sodium hydroxide was 20cm³. what was the volume of hydrochloric acid used if the reaction produced a 5.0^oC rise in temperature?

Date posted: February 19, 2019 . Answers (1)
Calculate the molar heat of vaporization of water.(H= 1.0,O= 16.O) (Solved)

Calculate the molar heat of vaporization of water.(H= 1.0,O= 16.O)

Date posted: February 19, 2019 . Answers (1)
State and explain the observations made when a filter paper dipped in Lead(II) ethanoate /Lead (II) nitrate(V) solution is put in a gas jar containing... (Solved)

State and explain the observations made when a filter paper dipped in Lead(II) ethanoate /Lead (II) nitrate(V) solution is put in a gas jar containing hydrogen sulphide gas

Date posted: February 19, 2019 . Answers (1)
Dry litmus papers and wet/damp/moist litmus papers were put in a gas jar containing sulphur(IV) oxide gas. State and explain the observations made (Solved)

Dry litmus papers and wet/damp/moist litmus papers were put in a gas jar containing sulphur(IV) oxide gas. State and explain the observations made

Date posted: February 19, 2019 . Answers (1)
Calculate the volume of sulphur (IV)oxide produced when 0.4 g of sulphur is completely burnt in excess air.(S = 32.0 ,I mole of a gas... (Solved)

Calculate the volume of sulphur (IV)oxide produced when 0.4 g of sulphur is completely burnt in excess air.(S = 32.0 ,I mole of a gas occupies 24 dm³ at room temperature)

Date posted: February 19, 2019 . Answers (1)
State and explain the Allotropes of Sulphur (Solved)

State and explain the Allotropes of Sulphur

Date posted: February 19, 2019 . Answers (1)
State the uses of alkanols (Solved)

State the uses of alkanols

Date posted: February 19, 2019 . Answers (1)
9.7 g of a mixture of Potassium hydroxide and Potassium chloride was dissolved to make one litre solution.20.0cm³ of this solution required 25.0cm³ of 0.12M... (Solved)

9.7 g of a mixture of Potassium hydroxide and Potassium chloride was dissolved to make one litre solution.20.0cm³ of this solution required 25.0cm³ of 0.12M hydrochloric acid for completed neutralization. Calculate the percentage by mass of Potassium chloride.(K=39.0,Cl= 35.5)

Date posted: February 18, 2019 . Answers (1)
46.0g of a metal carbonate MCO3 was dissolved 160cm³ of 0.1M excess hydrochloric acid and the resultant solution diluted to one litre.25.0cm³ of this solution... (Solved)

46.0g of a metal carbonate MCO3 was dissolved 160cm³ of 0.1M excess hydrochloric acid and the resultant solution diluted to one litre.25.0cm³ of this solution required 20.0cm³ of 0.1M sodium hydroxide solution for
complete neutralization. Calculate the atomic mass of "M"

Date posted: February 18, 2019 . Answers (1)
A certain carbonate, GCO3, reacts with dilute hydrochloric acid according to the equation given below If 1 g of the carbonate reacts completely with 20 cm³... (Solved)

A certain carbonate, GCO3, reacts with dilute hydrochloric acid according to the equation given below

If 1 g of the carbonate reacts completely with 20 cm³ of 1 M hydrochloric acid ,calculate the relative atomic mass of G (C = 12.0 = 16.0)

Date posted: February 18, 2019 . Answers (1)
20.0cm³ of 0.05 M acidified potassium manganate(VII)solution oxidized 25.0cm³ of Fe²⁺(aq) ions in 40.0g/l of impure Iron (II)sulphate(VI) to Fe³⁺(aq) ions. Calculate the percentage impurities... (Solved)

20.0cm³ of 0.05 M acidified potassium manganate(VII)solution oxidized 25.0cm³ of Fe²⁺(aq) ions in 40.0g/l of impure Iron (II)sulphate(VI) to Fe³⁺(aq) ions. Calculate the percentage impurities in the Iron (II)sulphate(VI).

Date posted: February 18, 2019 . Answers (1)
Calculate the molarity of a solution containing 4.0 g sodium hydroxide dissolved in 500 cm³ solution (Solved)

Calculate the molarity of a solution containing 4.0 g sodium hydroxide dissolved in 500 cm³ solution

Date posted: February 15, 2019 . Answers (1)
1.0g of an alloy of aluminium and copper were reacted with excess hydrochloric acid. If 840 cm³ of hydrogen at s.t.p was produced, calculate the... (Solved)

1.0g of an alloy of aluminium and copper were reacted with excess hydrochloric acid. If 840 cm³ of hydrogen at s.t.p was produced, calculate the % of copper in the alloy.(Al =27.0,one mole of a gas at s.t.p =22.4 dm³ )

Date posted: February 15, 2019 . Answers (1)
Calculate the volume of carbon(IV)oxide at r.t.p produced when 5.0 g of calcium carbonate is strongly heated.(Ca=40.0, C= 12.0,O = 16.0,1 mole of gas =22.4... (Solved)

Calculate the volume of carbon(IV)oxide at r.t.p produced when 5.0 g of calcium carbonate is strongly heated.(Ca=40.0, C= 12.0,O = 16.0,1 mole of gas =22.4 at r.t.p)

Date posted: February 15, 2019 . Answers (1)