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Chemistry question?
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WebQC.Org
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free homework help
chemistry problems questions and answers
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2004-2008
© Vitalii Vanovschi
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Instructions on balancing chemical equations:
- Enter an equation of a chemical reaction and press the 'Balance!' button. The answer will appear below
- Always use the upper case for the first character in the element name and the lower case for the second character.
Examples: Fe, Au, Co, Br, C, O, N, F. Compare: Co - cobalt and CO - carbon monoxide
- To enter an electron into a chemical equation use {-} or e
- To enter an ion specify charge after the compound in curly brackets: {+3} or {3+} or {3}.
Example: Fe{3+} + I{-} = Fe{2+} + I2
- Substitute immutable groups in chemical compounds to avoid ambiguity.
For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will
- Compound states [like (s) (aq) or (g)] are not required.
- If you do not know what products are enter regeants only and click 'Balance!'. In many cases a complete equation will be suggested.
Examples of complete chemical equations to balance:
- Fe + Cl2 = FeCl3
- KMnO4 + HCl = KCl + MnCl2 + H2O + Cl2
- K4Fe(CN)6 + H2SO4 + H2O = K2SO4 + FeSO4 + (NH4)2SO4 + CO
- C6H5COOH + O2 = CO2 + H2O
- K4Fe(CN)6 + KMnO4 + H2SO4 = KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 + H2O
- Cr2O7{-2} + H{+} + {-} = Cr{+3} + H2O
- S{-2} + I2 = I{-} + S
- PhCH3 + KMnO4 + H2SO4 = PhCOOH + K2SO4 + MnSO4 + H2O
- CuSO4*5H2O = CuSO4 + H2O
Examples of the chemical equations reagents (a complete equation will be suggested):
- H2SO4 + K4Fe(CN)6 + KMnO4
- Ca(OH)2 + H3PO4
- Na2S2O3 + I2
- C8H18 + O2
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