Classify which reaction is single replacement, double replacement, decomposition

Question

Classify which reaction is single replacement, double replacement, decomposition, combination and combustion. V2O5+HCl--->VOCl3+H2O Au2S3+H2--->AU+H2S Fe2(C2O4)--->FeC2O4+CO2 Ca3P2+H2O--->Ca(OH)2+PH3 BaCl2+Al2(SO)3--->BaSO4+AlCl3 Al4C3+H2O--->CH4+Al(OH)3 C2H5OH+3O2--->2CO2+3H2O Hg2CO3--->Hg+HgO+CO2 Si+S8--->Si2S4 NH3+O2--->NO+H2O C4H10+O2--->CO2+H2O H3PO3--->H3PO4+PH3 Au2O3--->Au+O2

Explanation / Answer

1. Synthesis - this involves the joining together of two simple substances to form a more complex substance. It has the form A + B --> AB ex. 2Na + Cl2 --> 2NaCl 2. Decomposition - it's when a complex substance breaks down into simpler substances (its constituents). it has the form AB --> A + B ex. 2NaCl --> 2Na + Cl2 3. Single-displacement - it's when a more active element displaces ("pushes away") another element in a compound. The one doing the displacing should be more active than the one being displaced. To know this, look at the activity series. The one on the top is the most active. Single displacement reactions have the general form A + BC --> AC + B ex. CL2 + 2 NaI -----> 2 NaCl + I2 4. Double-displacement - it's when two elements "exchange partners" with each other. It has the general form AB + CD --> AD + CB. ex. KNO3 + AgBr --> AgNO3 + KBr :)

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