CBSE Class 10 - Chemistry - Acids and Bases - pH of common Acids, Bases and Salts (#cbseNotes)

pH of common Acids, Bases and Salts

The acidity of an aqueous solution relies on the concentration of hydronium ions, [H₃O⁺]. For various products (acids, bases and salts), the magnitude of this concentration varies and pH scale is used conveniently. The pH of a solution is defined as the negative base-10 logarithm of the hydronium ion concentration (in mol/L). Here follows a partial list of pH of common acids, bases and salts.

Solution	PH range
HCL	1.0 - 2.0
Gastric Juices	1.4 - 2.0
Lemon Juice	2.0- 3.0
Vinegar	4.0
Tomato Juice (Oxalic Acid)	4.1
Coffee	5.0
Milk (Lactic Acid)	6.5
Soft Drinks	6.0
Pure Water (Distilled Water)	7.0
Potable Water	6.5 - 8.5
Saliva (Before Meals)	7.4
Saliva (After Meals)	5.8
Toothpaste	8
Blood	7.4
Dilute NaOH	7.4
Blood	10 - 12.0
Conc NaOH	13.0 - 14.0