Question

I want observations of activities 2.13 and 2.14 of the N.C.E.R.T. science textbook

Answer 1

ACTIVITY 2.14
 
COLLECT THE FOLLOWING SALTS 
SODIUM CHLORIDE 
POTASSIUM  NITRATE 
SODIUM ACETATE 
SODIUM CARBONATE 
SODIUM HYDROGENCARBONATE 
DROP FEW AMOUNT OF THESE SALTS IN A TEST TUBE SEPARATELY AND ADD 2ML OF DISTILLED WATER 

AND CHECK THE pH VALUE USING pH PAPER 

OBSERVATION 

NACL  pH VALUE IS 7
KNO3   pH VALUE IS 7
AND FOR NA2CO3, CH3COONA, NAHCO3  IT IS MORE THAN 7

SALTS OF A STRONG ACID AND STRONG BASE IS NEUTRAL WITH THE pH VALUE OF 7
SALTS OF A STRONG ACID AND WEAK BASE IS ACIDIC AND LESS THAN 7
SALTS OF STRONG BASE AND WEAK ACID IS BASIC IN NATURE AND IS MORE THAN 7

Answer 2

COLLECT THE FOLLOWING SALTS

SODIUM CHLORIDE

POTASSIUM NITRATE

SODIUM ACETATE

SODIUM CARBONATE

SODIUM HYDROGENCARBONATE

DROP FEW AMOUNT OF THESE SALTS IN A TEST TUBE SEPARATELY AND ADD 2ML OF DISTILLED WATER

AND CHECK THE pH VALUE USING pH PAPER

OBSERVATION

NACL pH VALUE IS 7

KNO3 pH VALUE IS 7

AND FOR NA2CO3, CH3COONA, NAHCO3 IT IS MORE THAN