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Changes in Matter _________ Changes – identity of substance does _____ change Examples: _____________ _____________ __________ __________ _________ _________.

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Presentation on theme: "Changes in Matter _________ Changes – identity of substance does _____ change Examples: _____________ _____________ __________ __________ _________ _________."— Presentation transcript:

1 Changes in Matter _________ Changes – identity of substance does _____ change Examples: _____________ _____________ __________ __________ _________ _________ _______ _______

2 Changes in Matter ________ Changes – identity of substance changes; _____ substance formed because atoms are rearranged Examples: hydrogen + oxygen _______ hydrochloric acid + sodium hydroxide ______________ + ________

3 Changes in Matter Reactants – substances on ____ side of arrow Reactants – substances on ____ side of arrow Products – substances on ______ side of arrow Products – substances on ______ side of arrow hydrogen + oxygen water hydrochloric acid + sodium hydroxide sodium chloride + water

4 Evidence of a chemical change: Gas (or smoke) production – _________, new _______ Gas (or smoke) production – _________, new _______ When vinegar and baking soda are mixed, the solution bubbles as carbon dioxide forms.

5 Evidence of a chemical change: Precipitate formation – two ____ solutions produce a ______ substance when mixed Precipitate formation – two ____ solutions produce a ______ substance when mixed When solutions of sodium sulfide and cadmium nitrate are mixed, cadmium sulfide, a solid precipitate forms.

6 Evidence of a chemical change: Energy release or absorption – ____, ____ Energy release or absorption – ____, ____ When aluminum reacts with Iron (III) oxide in the clay pot, energy is released as heat and light.

7 Evidence of a chemical change: ______ change in the reaction system ______ change in the reaction system When phenolphthalein is added to ammonia dissolved in water, a color change from colorless to pink occurs.


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