Question

Not all chemical reactions are reversible. Many, however, can be identified by observing one or more of the five signs below. Look at the five signs a chemical reaction is occurring and match the best example with the sign, one example per sign. One option will not be used. (5 points) Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse. Production of heat and light Formation of a gas (bubbles) Color change Odor change Formation of a precipitate cookies baking in the oven,vinegar and baking soda foaming like a volcano, a banana riping , phase change of liquid water to steam, the formation of solid lead iodide from sodium iodide and lead nitrate

Answer 1

Here are the correct matches for each sign of a chemical reaction:

1. Production of heat and light - Cookies baking in the oven
2. Formation of a gas (bubbles) - Vinegar and baking soda foaming like a volcano
3. Color change - A banana ripening
4. Odor change - (This option is not used)
5. Formation of a precipitate - The formation of solid lead iodide from sodium iodide and lead nitrate

The option that is not used is phase change of liquid water to steam.