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Chemical Reactions
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Identify the reactants and products. Photosynthesis.
Reactants: Carbon dioxide and water. Product: Sugar and oxygen.
Identify the reactants and products. Iron and sulfur.
Reactants: Iron and sulfur. Product: iron sulfide
Identify the reactants and products. Lime water is given carbon dioxide.
Reactants: lime water and carbon dioxide Product: milky white colour
Identify the reactants and products A baking soda mixed with vinegar.
Reactants: baking soda and vinegar Product: gas (carbon dioxide)
T/F. In a chemical reaction, the substances react together.
True.
Physical change or chemical change? Fireworks sparkle. Why?
Chemical. It produces heat, light and sound.
Physical change or chemical change? Burnt toast. Why?
Chemical. It changes colour and irreversible.
Physical change or chemical change? Slicing onion. Why?
Slicing is physical, the gas produced is chemical.
Physical change or chemical change? Burning a candle. Why?
Chemical change. It produces smoke.
the things we know that show us that something has happened or changed
evidence
the new substances that form in a chemical reaction
products
the substances that react together in a chemical reaction
reactants
Interact and change to make a new substance; also to respond to something.
react
What is a chemical reaction?
a process when two or more substances are mixed together and form a new substance
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