Question

conduct an experiment with acid and base​

Answer 1

Answer:

Aim:

To study the properties of acids (dilute HCl) and bases (dilute NaOH) by their reactions with the following:

Litmus solution (red/blue)

Zinc metal

Solid sodium carbonate

Materials required:

Test tube

Test tube stand

Cork

Test tube holder

Boiling tube

Droppers

Flat bottom flask

Burner

Match box

Beaker

Thistle funnel

Litmus paper/solution

Fresh lime water

Glass rod

Dilute HCl

Dilute NaOH

Zinc granules

Solid sodium carbonate

Theory:

What is acid?

Chemical species which donate proton or release H+ ions when dissolved in water are called acid. They turn blue litmus solution to red colour.

Hydrochloric acid reacts with zinc metal to produce zinc chloride and hydrogen gas. The reaction is given below:

Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

Hydrochloric acid reacts with Na2CO3 to produce carbon dioxide and turns the lime water milky as it forms calcium carbonate. The milkiness formed disappears when more than necessary carbon dioxide is passed through the solution. The reaction is as follows:

Na2CO3(s/aq) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + CO2(g)

Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)

CaCO3(s) + H2O(l) + CO2(g) → Ca(HCO3)2(aq)

Experimental Setup for Litmus Test Procedure:

• Take a test tube stand and place two test tubes in it.
• Label the test tube as test tube 1 and test tube 2.
• Add 5 ml of blue litmus solution to test tube 1.
• Add 5 ml of red litmus solution to test tube 2.
• Use a dropper and add equal drops of hydrochloric acid in the both test tubes.
• Wait and observe the colour change.

♠ Hope this may help you ♠

Answer 2

Answer:

hii I don't know answer of this