Question

E. Classify the following changes into physical or chemical change.
6. Addition of dilute acid to magnesium.​

Answer 1

Explanation:

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Answer 2

Answer:

Aim

To carry out the Reaction of Zinc with dilute sulphuric acid and classify it as physical or chemical changes

Theory

Physical Change: These changes can be observed and take place without changing the composition of substances. There are no changes in chemical nature of substance. The changes which can be observed are like change in colour, boiling point, melting point, hardness, density, fluidity, rigidity etc. The interconversion of states of matter is also a physical change.

Chemical change: In this change, chemical reaction takes place and completely a new substance with different properties is formed. There are changes in chemical properties and composition of substance.

ex: 2Mg(s) + O2(g) → 2MgO(s)

Here, the chemical composition and properties of product MgO is totally different from its reactants Mg and O.

Chemicals Required

Zinc Granules, Dilute Sulphuric Acid

Apparatus Required

Big hard Glass Test Tube, Jet Delivery Tube, Stand with Clamp, Cork, Match Stick

Procedure

Step 1: A big hard glass test tube is taken and fixed with clamp stand..

Step 2: Few pieces of zinc is put in the test tube.