Chapter 3: Textual Exercises

Q1. Write the products obtained when Na₂SO₄ is hydrolysis. i.e., reacts with water ?
Ans:- When Na₂SO₄ is hydrolysis. i.e., reacts with water it formed sodium ion and sulphate ion as products.
                   Na₂SO₄ + H₂O  -------->  2Na + SO₄ 

Q2. Write the formula of the acid and the base from which the salt NaCO₃ is obtained ?
Ans:- The acid is carbonic acid (H₂CO₃)
          The base is sodium hydroxide (NaOH)
                    H₂CO₃ + NaOH NaHCO₃+ H₂O
                    NaHCO₃ + NaOH Na₂CO₃ + H₂O.

Q3.  P^H of samples of HCl and acetic acid are 2 and 3.5 respectively. Which one is a stronger acid?
Ans:- HCl is stronger than acetic acid. Since Lower pH value is the stronger acid.

Q4. Fe(OH)₃ is less soluble in water than Ca(OH)₂. Which one is a weaker base?
Ans:- Fe(OH)₃ is the weaker base.

Q5. Device an experimental set up to show that dilute hydrochloric acid is a good conductor of electricity.
Ans:-

                      

        

          Hydrochloric acid is taken in a beaker. Two terminals of wire are deep in it.
When the key is closed, the bulb begin to glow. It shows that the HCl is a good conductor of electricity.

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