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

Washing soda and tooth paste : pH Value above 7

Lemon juice, vinegar and stomach juices : pH value below 7

The substances having pH value above 7 will turn red litmus paper to blue due to the basicity The substance having pH value less than 7 will turn blue litmus paper into red due to their acidity