Question

Find the pH value of the following substances using the pH paper and complete the table given below.

Name of Substance	colour of pH paper	pH value	acid/ base
Vinegar	............	..........	..........
Lime water	..........	.........	........
dil. Hydrochloric acid	no colour change	7	.......
Water		.........	Neutral
Washing soda Solution	.........	.........	.........
Ammonia Solution	..........	........	.......
Potassium nitrate solution	...........	..........	........
Sodium chloride solution	no colour change	.........	Neutral

Answer 1

Name of Substance	colour of pH paper	pH value	acid/ base
Vinegar	Red	less than 7	Acid
Lime water	Blue	more than 7	base
dil. Hydrochloric acid	Red	less than 7	Acid
Water	no colour change	7	Neutral
Washing soda Solution	Blue	more than 7	base
Ammonia Solution	Blue	more than 7	base
Potassium nitrate solution	no colour change	7	Neutral
Sodium chloride solution	no colour change	7	Neutral