Science, asked by rajenkalita1972, 4 months ago

when a metal 'X' is added to an acid solution 'Y' there is no evolution of any gas. Which of the following conclusion can be drawn from this observation?? ​

Answers

Answered by Taha018Ansari
0

Answer:

AIM

To study the chemical reaction of an iron nail with aqueous copper sulphate

solution; and to study the burning of magnesium ribbon in air.

(a) Chemical reaction of iron nail with copper sulphate solution in water.

THEORY

Iron displaces copper ions from an aqueous solution of copper sulphate. It is

a single displacement reaction of one metal by another metal. Iron is placed

above copper in the activity series. Elements placed above in this series are

more reactive than those placed below them. Thus iron is more reactive than

copper. In this reaction, metallic iron is converted into ferrous ion (Fe2+) and

cupric ion (Cu2 +) is converted into metallic copper.

Fe (s) + Cu2 + (aq) → Fe2+ (aq) + Cu (s).

MATERIALS REQUIRED

Two test tubes, two iron nails, measuring cylinder (50 mL), laboratory stand

with clamp, test tube stand, thread, a piece of sand paper, single bored

cork, copper sulphate, distilled water, and dil. sulphuric acid,

PROCEDURE

1. Take two iron nails and clean them with a sand paper.

E x p e r i m e n t 1

UNIT I

Materials

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Laboratory Manual Science

14

2. Take 20 mL of distilled water in a

clean test tube and dissolve 1.0 g of

copper sulphate in it. Add 2 or 3

drops of dil. sulphuric acid to it to

check hydrolysis of CuSO4 in water.

Label this test tube as A.

3. Transfer about 10 mL of copper

sulphate solution from tube A to

another clean test tube. Label this

test tube as B.

4. Tie one iron nail with a thread and

immerse it carefully in copper

sulphate solution in test tube B

through a bored cork [as shown in

the Fig 1.1(a)] for about 15 minutes

[Fig. 1.1(a)]. Keep the another iron

nail separately for comparison

afterwards.

5. After 15 minutes take out the iron

nail from the copper sulphate

solution.

Fig. 1.1 : (a) Iron nail dipped in copper sulphate solution; and (b) Iron nails

and copper sulphate solutions are compared

Test tube

Copper

sulphate

solution

(before

experiment)

Test tube

stand

Reaction mixture

(after experimnet)

6. Compare the intensity of blue colour of copper sulphate solution before

and after the experiment in tubes A and B, and also compare the

colour of iron nail dipped in copper sulphate solution with the one

kept separately [Fig. 1.1(b) and (c)]. Record your observations.

(a)

(b)

Test tube

Thread

Copper sulphate

solution

Iron nail

Stand

Iron nail taken out

from copper

sulphate solution

Iron nail

(c)

17-04-2018

Materials

15

Colour of copper

sulphate solution

Colour of iron nail

1.

2.

OBSERVATIONS

Sl.No. Property Before experiment After experiment

RESULTS AND DISCUSSION

Infer from your observations about the changes in colours of copper sulphate

solution and iron nail. Discuss the reason(s).

PRECAUTIONS

• The iron nails must be cleaned properly by using sand paper before

dipping them in copper sulphate solution.

Explanation:

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