Potassium reacts with iodine to form potassium iodide. 6.70 mol of potassium and 3.20 mol of iodine are available in lab. a) Write the balanced equation.

b) Find the limiting reactant.

c) Identify the excess reactant.

d) How many moles of product form?

e) How many moles of excess reactant are left over?

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e