Question 22
Your teacher demonstrates the following investigation. Two test tubes A and B each contain 10 ml of freshly prepared copper sulfate solution. A cleaned grey iron nail is immersed in B; a second nail is kept on white paper for comparison. After 20 minutes the immersed nail is removed and placed beside the other nail. Wear suitable gloves and safety goggles; do not touch or ingest chemicals.
What type of reaction is this, and why is it happening?
What type of reaction is this, and why is it happening?
