Chemical Reactions
What is the term for substances that enter a chemical reaction?
Reactants
What do we call the white grains we put on food to make it salty?
Table salt
What pH value represents a neutral substance?
7
What gas is required for combustion to occur?
Oxygen (O₂)
What does (aq) mean when written in a chemical equation?
Dissolved in water
What type of reaction occurs when a single substance breaks down into two or more products?
Decomposition reaction
What gas makes bread and cakes rise when baking?
Carbon dioxide (CO₂)
What is produced when an acid and a base neutralize each other?
Salt and water
What are two main products of complete combustion?
Carbon dioxide (CO₂) and water (H₂O)
What element is responsible for making bleaches effective?
Oxygen
This reaction releases energy in the form of heat and light and often involves oxygen.
Combustion reaction
What is plastic made from: natural materials or chemicals created by humans?
Chemicals created by humans (synthetic materials)
What household chemical is often used as an antacid?
Baking soda (sodium bicarbonate, NaHCO₃)
What do we burn in barbecues to cook food?
Propane (BBQ fuel)
What is the purpose of galvanizing metal?
To prevent rust by coating with zinc
The reaction between vinegar (acetic acid) and baking soda (sodium bicarbonate) is an example of what type of reaction?
Neutralization
What is the stretchy material used in clothes and sports gear, often found in leggings?
Nylon
What acid is in your stomach and helps break down food?
Stomach acid (Hydrochloric acid, HCl)
What type of combustion occurs when there is insufficient oxygen?
Incomplete combustion
Which metal is most commonly affected by corrosion (rusting)?
Iron (Fe)
Antoine Lavoisier’s Law of Conservation of Mass states what about reactants and products?
Mass is conserved; the total mass of reactants equals the total mass of products.
What liquid do we mix with baking soda to make it fizz and bubble?
Vinegar (acetic acid)
Name one method used to reduce sulfur dioxide emissions from industrial sources.
Scrubbing (desulfurization)
What can happen if there isn’t enough oxygen when something burns?
It burns incompletely and makes smoke, soot, and carbon monoxide.
What greenhouse gas is produced by combustion and contributes to climate change?
Carbon dioxide (CO₂)