what is pH of tap water?
pH of the tap water contains salts of magnesium and calcium so it is alkaline in nature that is pH will be above 7.
What are the colour of pH paper , approximate pH value, nature of substance for the following solutions :-
Saliva (before meal ) , saliva (after meal) , lemon juice, colourless aerated drink , carrot juice , coffee, tomato juice , tap water, 1M NaOH , 1M HCl