examples of chemical reactions in everyday life

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Question:In my Grade 10 Science course, there is a question that I have to base a whole project around or I don't get my credit. The question is: "Research and list an example from everyday life for each of the five types of chemical reactions." the 5 types of chemical reactions are (if I remember correctly) Synthesis, Decomposition, Combustion, Single Displacement, Double Displacement. I need an example of each of those types of reactions that relate to everyday life. I think that NaCl (table salt) is a Synthesis because it's Na Cl -> NaCl right? But I need some examples from everyday life for all the others please. Thanks in advance.

Answers:Your 10th grade chemistry class probably won't really give you the correct names of all the reaction types, but those are basically it. There are also lots more reaction types, but you won't cover those until later. Your 10th grade chemistry class will be filled with half-truths and broad horrible generalizations, but at least you will be exposed to chemistry. Na^+ + Cl^- --> NaCl is true, and would fall under synthesis reactions. A (formerly?) common decomposition reaction would be sodium bicarbonate's reaction that puts out fires (in fire extinguishers): 2NaHCO3 --> Na2CO3 + H2O + CO2. It is effective at putting out fires because of the CO2 blocking Oxygen getting to the fire, the H2O absorbing some of the heat, and then there is the fact that the reaction itself is endothermic, or that when it happens the area around gets a little colder. Combustion is a very common reaction - it's what makes our cars go, and it's what burning is. Basically it's something containing carbon reacts with oxygen to form CO2 and H2O. Here's a simple example of the combustion of Methane, a common "natural gas": CH4 + 2O2 --> CO2 + 2H2O There's no such "Single Displacement reaction" in my vocabulary. The closes thing I can think of would be an aqueous redox reaction: Mg + 2AgNO3 (silver nitrate) --> Mg(NO3)2 (magnesium nitrate) + 2Ag A "double displacement reaction" is actually called a metathesis reaction. It is a common reaction in aqueous salts: NaCl + AgNO3 --> NaNO3 + AgCl (this one is cool because AgCl is insoluble, so it's like putting two liquids together and getting a solid out of it).

Question:For my chemistry class i have to keep a journal for 6 hours during the day describing all he chemical reactions i would witness throughout the time-period. I have to provide descriptions for at least ten reactions such as the reaction when turning on a light bulb. Can you think of any ideas?

Answers:Two simple ones are witnessed by all of us every day. First one: respiration C6H12O6 + 6O2 6CO2 + 6H2O + energy Second one: photosynthesis 6CO2 + 6H2O + sunlight chlorophyll C6H12O6 + 6O2

Question:So, we were doing experiments in class and the teacher told us to bring close toe shoes the day before...well, i forgot and now i have to find 5 physical changes and 4 chemical changes at my house, describe the materials before and after, and record why it is a physical change...I am so confused right now =/ Can someone please help me? You could give examples of what i could do (i have to preform the experiment-stupid i know) and tell me why they are physical or chemical changes, it would really be helpful, cuz it's due tomorrow (Monday August 30th, 2010)

Answers:chemical changes: 1- cooking of the raw food : in this process the raw food will chang to the cooked food and after cooking, the food doesn't have the same quality before cooking. 2- digestion of food: your body can't use the foods before digestion. digestion makes the to very small parts and molecules in order that your body can use the food. 3- burning of wood in fireplace: when the wood is burning, it will transform to ash and its not wood anymore, so its a chemical change. 4- Rusting of iron:When it is raining a lot or there is water in somewhere in you home, for example your bathroom, the irons in the house structure become rusted and they won't have the qualities that iron has, because it had an reaction with oxygen. Physical changes: 1- Cutting the paper: When you cut a piece of paper, there will be smaller pieces of paper while the quality of the paper didn't change and it's the same paper before cutting and that is why it is physical change. 2- Boiling of water : When you heat the water until it boils, it changes to vapor but its chemical structure doesn't change and it is the same H2O before boiling. 3- melting of ice: when you put ice in a warm water, it starts to melt, but its chemical structure is H2O and it is the same chemical structure before melting. 4- breaking a glass: When you break a glass, it will break to smaller parts but its qualities won't change and it is the same glass before breaking. 5- dissolving of sugar in water: when you dissolve some sugar in water, it is a physical change. Because if you bil that water the you can see that sugar again. so dissolving sugar in water doesn't change the chemical qualities of sugar and only change its physical structure.

Question:Science Homework... My homework asks for 3 types of reactions that are important to life. Then my teacher wants me to describe reaction and show how it's important to life. So the only types of chemical reactions I know are synthesis reaction, decomposition reaction, single-displacement reaction, and double-replacement reaction. I know what they do, but the only reactions I find useful for everyday life are synthesis reaction and decomposition reaction. How are single-replacement reaction and double-replacement reactions important to everyday life? O yea, what breaks down into glucose? Is it sucrose or just food? Thanks!

Answers:I would suggest: Photosynthesis reaction is a good start Chlorophyll +CO2 makes O2 Then the other one Hemoglobin exchanging CO2 against O2 and the other way around. in the lungs O2 binds is then transported to the cells where it is used and replaced by CO2. Both these are Lewis acid base reactions. The last one I would suggest is a basic oxidation CH4+ 2O2 -> 2H2O + CO2 + energy This is important to everyday life as this is the basis for heating our houses. Ion reactions are important for your body too as you have a finely tuned balance if ions inside and outside your cells, but I haven't got a good example handy. [Ah, lastly the starch in your food is made into glucose.]

From Youtube

Chemical and Physical Changes in everyday life :This video shows examples of chemical and physical changes in our everyday lives.

Effervescence in Chemical Reactions :www.SimpleChemConcepts.com We have seen or hear about Effervescence in the laboratory on Metal - Acid Reactions, Acid - Metal Carbonate Reactions, etc.. How about Effervescence in Our Everyday Lifes? Outside the Chemistry Labs? Visit us @ http for more Chemistry Phenomenons that will accelerate your learning of Chemistry Theories and Concepts