Question

Question 10 (1 point)
As part of a demonstration, Mr. Wadlow took flat copper wire and wrapped it around a pencil to make a coil. Then, he placed the coiled copper wire into a beaker of clear silver nitrate solution. After thirty minutes, gray particles collected on the copper, and the solution turned blue. What resulted from the combination of the copper wire and the silver nitrate solution?

a
a physical change, as demonstrated by the coiled wire
b
a chemical change, as demonstrated by the coiled wire
c
a physical change, as demonstrated by the gray particles and the blue solution
d
a chemical change, as demonstrated by the gray particles and the blue solution

Answer 1

d

This is a chemical change: copper metal displaces silver from silver nitrate, producing silver deposits (gray particles) and copper(II) nitrate in solution (blue).