double displacement chemical reaction

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Question:can you please give me examples of these chemical reactions 1. Synthesis 2. Decomposition 3. Single Displacement 4. Double Displacement

Answers:1. 2 H2(g) + O2(g)--->2 H2O,(l) synthesis 2 .2 H2O-(l)--> O2)g)+2 H2 (g) , decomposition 3. 2NaCl(aq)+ F2(g)--->2 NaF(aq)+ Cl2(g), single displacement 4. AgNO3(aq)+ NaCl(aq)---> AgCl(s) + NaNO3(aq), double displacement

Question:I've learnt in Chemistry class about reactions between two aqueous compounds, but is it possible for there to be a reaction between an aqueous compound and an insoluble compound? If it is, what are the requirements? Would it involve the activity series, somehow? Examples would be appreciated.

Answers:Yes, a reaction can occur between an aqueous compound and an insoluble compound, but it occurs only on the surface, unless the precipitate does not adhere to the reactant, and therefore falls off, exposing more solid to the solution. This is therefore usually not a useful method for preparing an insoluble solid. One example is the reaction between calcium carbonate and sulfuric acid. Fizzing occurs initially, but calcium sulfate builds up on the surface, and calcium carbonate stops dissolving. CaCO3(s) + H2SO4(aq) -----> CaSO4(s) + CO2(g) + H2O(l) (This is actually an acid-base reaction.) Another example is Ag2O(s) + 2HI(aq) -----> 2AgI(s) + H2O(l) This reaction occurs because AgI is more insoluble than Ag2O.

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.]

Question:What kind of chemical reactions form precipitates? I know that double displacement does, but I am unsure about single displacement. Thank you!

Answers:You're right... it's just double displacement reactions. Single displacements are not considered precipitation reactions.

From Youtube

Double Displacement Reaction :This reaction (one of my new favorite reactions), is known as a double displacement reaction. This is because 2 reactants mix to form new compounds, exchanging chemicals with each other along the way. For example, calcium chloride (CaCl2) mixes with sodium bicarbonate (NaHCO3). This forms sodium chloride (NaCl), calcium carbonate (CaCO3), water (H2O), and carbon dioxide (CO2). The orange-yellow color comes from the carbonic acid generated when the water mixes with the carbon dioxide. Here's the equation: CaCl2 + 2 NaHCO3 2 NaCl + CaCO3 + H2O+ CO2.

Five Major Chemical Reactions :Animation explaining the five major chemical reactions: synthesis, decomposition, single displacement, double displacement, and combustion