Writing Chemical Reactions Formula
It is very critical to understand the various ionic compounds that make up a chemical formula. This is the initial basic step to writing a chemical formula. However, it is important to remember that when writing a formula for the various ionic compounds, all you need to do is carefully crisscross the numerical figures of the charges into the right subscripts for the elements. Additionally, it is vital to remember that all polyatomic ions are put in bracket whenever there are several of them as indicated below.
Example
Ca+2 Cl –1 criss-cross to make the chemical formula CaCl2
NOTE: DO NOT WRITE 1 IN THE SUBSCRIPT.
Example of a formula of polyatomic ions
Al+3 SO4-2 makes Al2(SO4)3
Clearly write down the chemical formula of the following hydrocarbons (alkaline) the formula takes the form CnH2n+2
- Ethane _____________ 6. pentane _____________
- Methane _____________ 7. heptane _____________
- Octane _____________ 8. Propane _____________
- Decane _____________ 9. nonane _____________
- Hexane _____________ 10. butane _____________
Write down the formulas for the following salts (ionic compounds)
- Magnesium Fluoride _____________
- Zinc Carbonate _____________
- Aluminum Iodide _____________
- Potassium Phosphate _____________
- Sodium Chloride _____________
- Iron (Ii) Sulfate _____________
- Calcium Nitride _____________
- Cobalt (Ii) Chlorate _____________
- Barium Nitrate _____________
- Copper (I) Sulfide _____________
Write down the formulas for the following metal oxides (basic oxides)
- Lithium Oxide _____________
- Iron (Iii) Oxide _____________
- Silver Oxide _____________
- Copper (Ii) Oxide) _____________
- Barium Oxide _____________
- Magnesium Oxide _____________
- Nickel (Ii) Oxide _____________
- Potassium Oxide _____________
- Tin (Iv) Oxide _____________
- Cesium Oxide _____________
Write down the formulas for the following bases (HINT, ENDS IN HYDROXIDE)
- lithium hydroxide _____________
- zinc hydroxide _____________
- barium hydroxide _____________
- lead (ii) hydroxide _____________
- calcium hydroxide _____________
- aluminum hydroxide _____________
- potassium hydroxide _____________
- magnesium hydroxide _____________
- copper (i) hydroxide _____________
- copper (ii) hydroxide _____________
Clearly indicate the chemical formula for the following acids, (HINT, starts with hydrogen)
- Nitric Acid _____________
- Nitrous Acid _____________
- Hydrofluoric Acid _____________
- Phosphorus Acid _____________
- Sulfuric Acid _____________
- Hydrosulfuric Acid _____________
- Carbonous Acid _____________
- Hydroiodic Acid _____________
- Sulfurous Acid _____________
- Carbonic Acid _____________
Types Of Chemical Reactions
Generally, there are five major types of chemical reactions as simplified by the following equations:
- Combination or synthesis represented by A + B AB
- Combustion represented by ? + O2 ?
- Double Replacement represented by XY + AB XB + AY
- Decomposition represented by AB A + B
- Single Replacement represented by X + AB XB + A or Y + AB AY + B
Clearly indicate the type of chemical reactions represented below (decomposition, synthesis, double-displacement, sing-displacement or combustion) and balance the equations.
- __NaBr + __Ca(OH)2 à __CaBr2 + __NaOH Type of Reaction : ______________
- __C5H9O + __O2 à__CO2 +__H2 Type of Reaction: ______________
- __Li3N + __NH4NO3 à__LiNO3 + __(NH4)3N Type of Reaction: ______________
- __NH3+ __H2SO4 à __(NH4)2SO4 Type of Reaction: ______________
- __Pb + __H3PO4 à__H2 + __Pb3(PO4)2 Type of Reaction: ______________
- __HBr + __Al(OH)3 à __H2O +__AlBr3 Type of Reaction: ______________
Numbers 7 to 20 represent several chemical reactions, clearly indicate the type of chemical reaction represented below. Indicate whether it is a decomposition, a synthesis, combustion, a double-displacement, or a single-displacement, then balance the equations appropriately.
- __Na3PO4 + __KOH à __NaOH + __K3PO4 Type of Chemical Reaction ______________
- __C6H12 + __O2 à __CO2 + __H2O Type of Chemical Reaction ______________
- __CaCO3 à __CaO + __CO2 Type of Chemical Reaction ______________
- __RbNO3 + __BeF2 à __Be(NO3)2 + __RbF Type of Chemical Reaction ______________
- __C3H6O + __O2 à __CO2 + __H2O Type of Chemical Reaction ______________
- __SeCl6 + __O2 à __SeO2 + __Cl2 Type of Chemical Reaction ______________
- __MgI2 + __Mn(SO3)2 à __MgSO3 + __MnI4 Type of Chemical Reaction ______________
- __O3 à __O2. + __O2 Type of Chemical Reaction ______________
- __NO2 à __O2 + __N2 Type of Chemical Reaction ______________
- __MgCl2 + __Li2CO3 à __MgCO3 + __LiCl Type of Chemical Reaction ______________
- __Pb + __FeSO4 à __PbSO4 + __Fe Type of Chemical Reaction ______________
- __P4 + __O2 à __P2O3 Type of Chemical Reaction ______________
- __AgNO3 + __Cu à __Cu(NO3)2 + __Ag Type of Chemical Reaction ______________
- __C5H5 + __Fe à __Fe(C5H5)2 Type of Chemical Reaction ______________
- Explain what reactions take place during combustion.
- While labeling all the elements, give an example of a chemical equation.
- What is the difference between an endothermic and exothermic reaction?
- What is a catalyst? Give two examples.
- What are the 4 main types of reactions?
- What are the different types of reactions in chemistry?
- How many types of chemical reactions exist?
- What is a single displacement reaction?
- What is the difference between displacement reaction and decomposition reaction?
- Define a chemical reaction
- What is a chemical formula?
- What are 5 examples of chemical formulas?
- What are the first 20 compounds?
- What is a chemical formula essay?
- What is the chemical formula of water?
- Classify the following chemical reactions
- Mg + N2
- Zn + CuCl2
- AgNO3 + NaI
- MgCO3
- HI
- C2H6 + O2
- Ca + H2O
- Fe(NO3)3 + LiOH
- SO2 + H2O
- H2SO4 + LiOH
- Classify the following reactions appropriately
- 2 H2S + 3 O2 2 SO2 + 2 H2O
- Mg(OH)2 MgO + H2O
- CaO + H2O Ca(OH)2
- Li2O + CO2 LiCO3
- MgCO3 MgO + CO2
- Zn + Cl2 ZnCl2
- Cu + 2 AgNO3 Cu(NO3)2 + 2 Ag
- CaCl2 + Na2SO4 CaSO4 + 2 NaCl
- Pb + 4 HCl PbCl4 + 2 H2
- SO2 + H2O H2SO3
