Making Toxic Gas!!!!

We are continuing with chemical changes in grade 4. Almost everyone has mixed vinegar and baking soda at some time in their lives. We focused on that reaction this week. I told the students that we should hold our breath because we were making a toxic gas. Don't worry, we breathed easily after the reaction. We just made some Carbon dioxide. Next week we will talk more about that gas and how it really only is dangerous when it pushes all the oxygen away. We use it in fire extinguishers to deprive fires of oxygen. It was also blamed for this tragedy. Look for evidence of chemical changes in these pictures: bubbles, color changes etc.