Thursday, April 29, 2021

Acids, Bases and Salts | Class 10 | Activity 2.14 with Solution

Activity 2.14
  • Collect the following salt samples – sodium chloride, potassium nitrate, aluminium chloride, zinc sulphate, copper sulphate, sodium acetate, sodium carbonate and sodium hydrogen carbonate (some other salts available can also be taken).
  • Check their solubility in water (use distilled water only).
  • Check the action of these solutions on litmus and find the pH using a pH paper.
  • Which of the salts are acidic, basic or neutral?
  • Identify the acid or base used to form the salt.
  • Report your observations in Table 2.4.

Salt

pH

Acid used

Base used

 

 

 

 


✅ Answer:

Salt

pH

Acid used

Base used

Sodium chloride

7

HCl

NaOH

Potassium nitrate

7

HNO3

KOH

Aluminium chloride

7

HCl

Al(OH)3

Zinc sulphate

7

H2SO4

Zn(OH)2

Copper sulphate

< 7

H2SO4

Cu(OH)2

Sodium acetate

> 7

CH3COOH

NaOH

Sodium carbonate

> 7

H2CO3

NaOH

Sodium hydrogen carbonate

> 7

H2CO3

NaOH



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