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Published byAntonio Richards Modified over 11 years ago
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Changes in Matter Physical phase changes dissolving crushing tearing
_________ Changes – identity of substance does _____ change Examples: _____________ __________ _________ _______ not phase changes dissolving crushing tearing
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Changes in Matter Chemical water
________ Changes – identity of substance changes; _____ substance formed because atoms are rearranged Examples: hydrogen + oxygen _______ hydrochloric acid + sodium hydroxide ______________ + ________ new water sodium chloride water
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Changes in Matter left right
Reactants – substances on ____ side of arrow Products – substances on ______ side of arrow hydrogen + oxygen water hydrochloric acid + sodium hydroxide sodium chloride water right
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Evidence of a chemical change:
bubbling Gas (or smoke) production – _________, new _______ odor When vinegar and baking soda are mixed, the solution bubbles as carbon dioxide forms.
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Evidence of a chemical change:
Precipitate formation – two ____ solutions produce a ______ substance when mixed clear cloudy When solutions of sodium sulfide and cadmium nitrate are mixed, cadmium sulfide, a solid precipitate forms.
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Evidence of a chemical change:
Energy release or absorption – ____, ____ heat light When aluminum reacts with Iron (III) oxide in the clay pot, energy is released as heat and light.
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Evidence of a chemical change:
Color ______ 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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