December 7, 2022

Scientific Knowledge

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Observing the action of zinc, iron, copper and aluminium metals for the given salt solutions. (Experiments-06)

Observing the action of zinc, iron, copper and aluminium metals for the given salt solutions. (Experiments-06)?


Experiment – 06

Aim:

  1. Observe the action of Zn, Fe, Cu and Al metals for the given salt solutions.
    1. Zinc sulphate (ZnSO4)
    1. Copper sulphate (CuSO4)
    1. Ferrous sulphate (FeSO4)
    1. Aluminium sulphate
  2. Arranging the metals Zinc, Copper, Iron, and Aluminium in the decreasing order of reactivity based on the results obtained from the above.

Materials required:

  1. Aluminium foil and Aluminium sulphate solution
  2. Zinc granules and Zinc sulphate solution
  3. Copper turnings and Copper sulphate solution
  4. Iron filings and Ferrous sulphate solution
  5. Four 50ml beakers
  6. Test tube and Test tube stand

Theory:

What is reactivity series?

Different metals have different reactivity with chemical reagents. The reactivity series is a series of metals, in order of reactivity from highest to lowest.

MetalsMetal IonReactivity
KK+reacts with water
NaNa+reacts with water
LiLi+reacts with water
CaCa2+reacts with water
MgMg2+reacts with acids
AlAl3+reacts with acids
MnMn2+reacts with acids
ZnZn2+reacts with acids
CrCr2+reacts with acids
FeFe2+reacts with acids
H2H+included for comparison
CuCu2+highly unreactive
HgHg2+highly unreactive
AgAg+highly unreactive
AuAu3+highly unreactive
PtPt+highly unreactive

Experimental Setup:

Observing the action of zinc, iron, copper and aluminium metals for the given salt solutions. (Experiments-06)
Observing the action of zinc, iron, copper and aluminium metals for the given salt solutions.

Procedure:

  1. Wash four beakers with distilled water, dry them and label them A, B, C, D.
  2. Prepare 50 ml solution with 5% concentration by volume of ferrous sulphate, aluminium sulphate, copper sulphate, zinc sulphate.
  3. Pour Zinc sulphate, Ferrous sulphate, cupper sulphate and aluminium sulphate in A, B, C, D beaker respectively.
  4. Take metal strips of aluminium (Al), iron (Fe), copper (Cu), and zinc (Zn).
  5. Now dip one of the four metal strips in all the four test tubes and observe if any colour change occurs in all four test tubes.
  6. Continue step 5 with other metal strips by dipping in fresh aqueous solutions of metals and see the displacement reaction.

Observation:

MetalDipped inObservation
AlZnSO4No change in the solution. Zinc metal which is greyish accumulates on Aluminium metal.
AlCuSO4Blue solution becomes colourless. Copper metal which appears reddish brown gets accumulated.
AlAl2(SO4)3No reaction.
AlFeSO4Green solution becomes colourless. Iron metal which appears greyish black gets accumulated.
FeZnSO4No reaction.
FeCuSO4Solution becomes light green. Copper metal which appears reddish brown gets accumulated.
FeAl2(SO4)3No reaction.
FeFeSO4No reaction.
ZnZnSO4No reaction.
ZnCuSO4Blue solution turns colourless. Reddish brown coppers accumulates on zinc metal.
ZnAl2(SO4)3No reaction.
ZnFeSO4Light green solution turns colourless. Greyish black iron accumulates on zinc metal.
CuZnSO4No reaction.
CuCuSO4No reaction.
CuAl2(SO4)3No reaction.
CuFeSO4No reaction.

Result:

MetalsInference
AluminiumAluminium displaces zinc, copper, and iron from their solutions. Aluminium is the most reactive metal.
ZincZinc displaces copper, and iron from their solutions. Zinc is more reactive than Cu and Fe metal.
IronIron displaces copper from its solution. Therefore, copper is less reactive than iron.
CopperCopper does not displace any metal therefore it is the least reactive.

2. The decreasing order of reactivity of metals is as follows:

Al>Zn>Fe>Cu

Precautions:

  • Use cleanly washed and dried apparatus for the experiment.
  • You can clean all metals with sandpaper.
  • Use small quantities of salt solution of given metals.

Observing the action of zinc, iron, copper and aluminium metals for the given salt solutions. (Experiments-06)?

List of Experiments :

Experiment -01 To determine the pH of the given samples using pH paper or universal indicator. The samples whose pH has to be determined are-

Experiment -02: How can you explain plants can respire and release carbon dioxide?

Experiment -03 To study about (a) Binary Fission in amoeba and (b) Budding in yeast with the help of prepared slides.

Experiment -04 To study the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance.

Experiment – 05 Types of Reactions

Experiment – 06 : Observing the action of zinc, iron, copper and aluminium metals for the given salt solutions.

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