Cambridge Secondary (7-9). Stage 7. MCE Science. Student Book - Unit 8: Acids and Alkalis - Question 82

Traditional paper made from wood pulp contains acids. Books made from this type of paper eventually fall apart. Now, powdered calcium carbonate is added to most paper made from wood pulp. The physical properties of the calcium carbonate make the paper white and smooth. Books made from this second type of paper can last for hundreds of years.

Suggest how the chemical properties of calcium carbonate make the paper last longer.