- The drain cleaner is added into water
- A drain cleaner consists of sodium hydroxide and aluminum
- Hence, sodium hydroxide, aluminum, and water are combined

- Sodium hydroxide, aluminum, and water are combined
- Hydrogen is produced
- Hence, hydrogen is produced when sodium, aluminum, and water are combined

- Sodium hydroxide, aluminum, and water are combined
- The solution becomes really hot
- So, heat energy is released when sodium hydroxide, aluminum, and water are combined

- Hydrogen is produced when sodium, aluminum, and water are combined
- Heat energy is released when sodium hydroxide, aluminum, and water are combined
- So, a chemical reaction happened when sodium hydroxide, aluminum, and water are combined

Therefore, a chemical reaction happened when sodium hydroxide, aluminum, and water are combined
Q: A drain cleaner consists of sodium hydroxide and aluminum. When the drain cleaner is added to water, bubbles of hydrogen are produced, and the solution becomes very hot. Which of these best describes what happens to form the bubbles when the cleaner is added to water? F
Context:
- The drain cleaner is added into water 
- Hydrogen is produced 
- The solution becomes really hot 
- A drain cleaner consists of sodium hydroxide and aluminum