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Washing your hands with water isn’t a chemical reaction because you’re just mechanically rinsing away grime. Sodium bicarbonate released into the small intestine neutralizes the acid and protects the digestive tract from dissolving itself.
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Hydrochloric acid and enzymes break down proteins in your stomach. When you put food in your mouth, water and the enzyme amylase breaks down sugar and other carbohydrates into simpler molecules. Digestionĭigestion is a complex process that involves thousands of chemical reactions. Spontaneous reactions occur in galvanic cells, while nonspontaneous reactions take place in electrolytic cells. The type of reaction depends on the battery. XH 2O ElectrochemistryĮlectrochemical reactions are redox (oxidation and reduction) reactions that convert chemical energy into electrical energy. Here is the chemical equation for the rusting of iron:įe + O 2 + H 2O → Fe 2O 3. The reaction also releases heat, but it usually occurs too slowly for this to be noticeable. When iron rusts, it changes color and texture to form a flake coating called rust. Rust, verdigris, and tarnish are all examples of common oxidation reactions. The equation for one form of anerobic respiration is: Yeast and bacteria use anerobic respiration in the form of fermentation to make everyday products, such as wine, vinegar, yogurt, bread, cheese, and beer. Humans use anaerobic respiration during intense or prolonged exercise to get enough energy to muscle cells. Organisms also have ways to get energy without oxygen. Here is the overall equation for aerobic cellular respiration:Ĭ 6H 12O 6 + 6O 2 → 6CO 2 + 6H 2O + energy (36 ATP) Aerobic respiration reacts glucose and oxygen to form water and chemical energy in the form of adenosine triphosphate (ATP). The overall chemical reaction for photosynthesis is:Ħ CO 2 + 6 H 2O + light → C 6H 12O 6 + 6 O 2 Aerobic Cellular RespirationĪnimals use the oxygen provided by plants to perform essentially the reverse reaction of photosynthesis to get energy for cells. It’s a key reaction because it generates oxygen and yields food for plants and animals. Plants use a chemical reaction called photosynthesis to convert carbon dioxide and water into food (glucose) and oxygen. Here is the reaction for the combustion of propane, a fuel used in gas grills and some fireplaces:Ĭ 3H 8 + 5O 2 → 4H 2O + 3CO 2 + energy Photosynthesis In a combustion reaction, a fuel reacts with oxygen from air to produce water and carbon dioxide. You experience combustion reactions when you strike a match, burn a candle, start a campfire, or light a grill. Here is a closer look at some everyday reactions, along with some chemical equations. A Closer Look at Chemical Reactions in Daily Life
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Some chemicals are inorganic, while those with carbon and hydrogen are organic.