Separate the following into substances having pH values above and below 7. How do these influence litmus paper?
(i) Lemon juice (ii) Solution of washing soda (iii) Toothpaste (iv) Vinegar (v) Stomach juices
Substance |
pH value |
Litmus paper |
Lemon juice |
Below 7 |
Blue litmus turns red |
Solution of washing soda |
Above 7 |
Red litmus turns blue |
Toothpaste |
Above 7 |
Red litmus turns blue |
Vinegar |
Below 7 |
Blue litmus turns red |
Stomach juices |
Below 7 |
Blue litmus turns red |