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Bookmark or Share- Balancing Chemical Equations - Chemistry - SocraticMass is conserved rather than created or destroyed so when a chemical equation is written, it must be balanced so that there is the same amount of reactants going in as yielded product. The equation is balanced by changing the scalar numbers that precede each part of the equation.
- Why is ZnCl_2 is an acid though it does not have a H^+ or a OH ...ZnCl2 is a Lewis acid because of the following reasons Zn+2 is a Lewis acid the chlorine does not hydrolyze so the equation would be like this ["Zn"("H"_ 2"O")_ 6]_ ((aq))^(2+) + "H"_ 2"O"_ ((l)) rightleftharpoons ["Zn"("H"_ 2"O")_ 5("OH")]_ ((aq))^(+) + "H"_ 3"O"_ ((aq))^(+) H_3O^+ indicates that something is acidic Another way to determine ZnCl2 is acidic is this ZnCl_2 + 2H_2O = Zn(OH)_2 ...
- Conjugate Acids and Conjugate Bases - Chemistry - SocraticHCO₃⁻ + H₂O → H₂CO₃ + OH⁻ base + acid → Conj A + Conj B. We see that HCO₃⁻ becomes H₂CO₃. It has one more H atom and one more + charge (-1 + 1 = 0). So H₂CO₃ is the conjugate acid of HCO₃⁻. The H₂O becomes OH⁻. It has one less H atom and one more – charge. So OH⁻ is the conjugate base of H₂O.
- pH - Chemistry - SocraticpH is a measure of hydrogen ion concentration. The pH scale was originated by Sorensen. He set 0 pH as the hydrogen ion concentration of a 1.0 molar solution of a strong monoprotic acid (like HCl).
- Balancing Redox Equations Using the Oxidation Number MethodBalancing a redox reaction requires identifying the oxidation numbers in the net ionic equation, breaking the equation into half reactions, adding the electrons, balancing the charges with the addition of hydrogen or hydroxide ions, and then completing the equation.
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