Question

explain an activity to show the reaction of bases with metals

Answer 1

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Aim : To show the reaction of acids with metals.
Required Materials : 1. Test tube 2. Delivery tube 3. Glass trough 4. candle 5. Soap water 6. Dil. HCl 7. Zinc granules.

Procedure :

Set the apparatus as shown in figure.

Take about 10 ml of dilute HCl in a test tube and add a few zinc granules to it.

We will observe the formation of gas bubbles on the surface of zinc granules.

Pass the gas being evolved through the soap water.

Gas filled bubbles are formed in the soap solution which rise into the air.

Bring a burning candle near the gas filled bubbles.

The gas present in a soap bubble burns with a ‘pop’ sound.
Result:

Only ‘hydrogen’ gas burns making a ‘pop’ sound.

So we will notice that gas evolved is ${ H }_{ 2 }$.

• (Picture Of Chemical Reaction)

Additional Experiment:

Repeat the above experiment with $H_{2}SO_{4}$ and $HN{{O}_{3}}$.

We observe the same observation of the HCl experiment.
Conclusion : From the above activities we can conclude that when acid reacts with metal, ${ H }_{ 2 }$gas is evolved

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Answer 2

Explanation:

Aim: To show the reaction of bases with metals

Required materials: test tube, delivery tube,glass trough,candle, soap water,sodium hydroxide (NaOH) solution,Zinc granules

Procedure:1)Take about 10ml of dilute sodium hydroxide (NaOH) solution in a

test tube

2)add a few granules of Zinc metal to it

Observations: Hydrogen gas is liberated

1)the gas present in a soap bubble burns

with the pop sound

Diagram is similar to acid and metal activity

conclusion:

chemical reaction:

2NaOH+Zn gives rise to Na2ZnO2+H2