Question

9. A student observed the following reaction:

Answer 1

Answer:

The substance that remained on the filter paper is Al(OH).

Explanation:

• Filter paper is the substance that is used in laboratory to separate the solid objects. It doesn't filter aqueous and gaseous products.
• So in our experiment the product formed is aluminum hydroxide Al(OH)   and sodium chloride (NaCl).
• Between two products, sodium chloride is in aqueous form as indicated in the question. So it wont remain in the filter paper.

• Hence aluminum hydroxide being only solid product remains on the filter paper.