Acid-base indicators change color depending on whether they are ... a different reaction happens that changes the indicator molecule and it looks green. This activity is adapted from an activity that ...

Neutralisation is the reaction of an acid with a base that results in the pH moving towards 7. It is a useful process that occurs in everyday life such as in the treatment of acid indigestion and ...

You can make your own using the cochineal insects from the activity on page 5 in this edition of ... but it is a good model for the acid from an insect bite. Acids, bases, and neutral substances can ...