Question

0.14) Neha prepared a blue coloured solution of copper sulphate in a beaker. She
added a magnesium nibbon to it and observed the changes after an hour.
a) What is the change of colour of the solution?
b) Name the type of the chemical reaction involved.
c) What will happen if we add copper wire in magnesium sulphate solution? Give
suitable reason for your answer.​

Answer 1

Answer:

a)ans: Whether a solution is acidic or basic can be measured on the pH scale. When universal indicator is added to a solution, the color change can indicate the approximate pH of the solution. Acids cause universal indicator solution to change from green toward red.

b)ans: Explanation: The main four types of reactions are direct combination, analysis reaction, single displacement, and double displacement. If you're asked the five main types of reactions, it is these four and then either acid-base or redox (depending who you ask).

c)ans: magnesium becomes coated with copper. the blue colour of the solution fades as blue copper sulfate solution is replaced by colourless magnesium sulfate solution.

Answer 2

Explanation:

Ans1) The colour will change to red-green solution of iron sulphuric

Ans2) In beaker A a reddish brown layer of copper will deposit on the iron nail and the blue coloured solution will become yellowish green. (copper layer will change iron).

Ans3) The blue colour of the copper sulfate solution gets lighter.

Mg+CuSO

4

⟶MgSO

4

+Cu

(Blue)

By addingMagnesium to CuSO

4

, it turns to MgSO

4

.

Because Mg is above Cu in reactivity series. So Mg displaces Cu in CuSO

4

. As reaction processes, CuSO

4

content decreases.

∴ Color blue fades.