Note any bubbling or fizzing action as the production of a gas. Write a balanced formula equation for the reactions that do occur. Include physical state symbols for the reactants and products. IV and V are special reactions with three products. There should be three different gases produced in this set of micro-reactions.
Yeast is a catalyst for the decomposition that produces oxygen.
No Reaction Copper will not react with acid. Hydrogen is explosive. A burning splint will be extinguished in the presence of carbon dioxide.