1. Lemon juice (pH 2.2) = Acidic
2. Salt solution (pH 7) = Neutral
3. Baking soda (pH 9) = Alkaline
4. Bleach (pH 13) = Alkaline
5. Tomato juice (pH 4) = Acidic
6. Gastric juices (pH 1) = Acidic
Explanation:
The pH scale measures how acidic or alkaline a substance is. The pH scale ranges from 0 to 14.
A pH of 7 is neutral.
Acidic substances have pH less than 7.
Alkaline(Base) substances have a pH greater than 7
Hence, the given samples can be categorized as acidic, basic or neutral based on their pH values.
1. Lemon juice (pH 2.2 < 7) = Acidic
2. Salt solution (pH 7 = 7) = Neutral
3. Baking soda (pH 9 > 7) = Alkaline
4. Bleach (pH 13 >7) = Alkaline
5. Tomato juice (pH 4 < 7) = Acidic
6. Gastric juices (pH 1 < 7) = Acidic
