Question

pH value of the following: Saliva before and after meal Lemon juice Colourless aerated juice Carrot juice Coffee Tomato juice Tap water 1M NaOH 1M HCl

Answer 1

✯ before meal: 7 { green }
✯ after meal: 5 { yellow }
✯ lemon juice: 2 { pink }
✯ colorless aerated drink: 6 { lime green }
✯ carrot juice: 5.6 { yellow / green }
✯ coffee: 5  { yellow }
✯ tomato juice: 4{ beige }
✯ tap water: 7 { green / lime green }
✯ NaOH: 14 { purple }
✯ HCL: 1 { red }