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22 January, 19:00

Which of these equations I balanced

A. 3H2SO4+2AL - - - > AL2 (SO4) 3+3H2

B. 2KCL+Pb (NO3) 2 - - - > KNO3 + PbCl2

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Answers (1)
  1. 22 January, 22:59
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    Equation A:

    3H2SO4+2AL - - - > AL2 (SO4) 3+3H2

    For the reactants we have:

    6 moles of hydrogen

    3 moles of sulphur

    12 moles of oxygen

    2 moles of aluminum

    For the products we have:

    2 moles of aluminum

    3 moles of sulphur

    12 moles of oxygen

    6 moles of hydrogen

    Comparing the number of moles of each element in the reactants and products side of the equation, we can see that this equation is balanced

    Equation B:

    2KCL+Pb (NO3) 2 - - - > KNO3 + PbCl2

    For the reactants we have:

    2 moles of K

    2 moles of Cl

    1 mole of Pb

    2 moles of N

    6 moles of O

    For the products we have:

    1 mole of K

    1 mole of N

    3 moles of O

    1 mole of Pb

    2 moles of Cl

    Comparing the number of moles of each element in the reactants and products side of the equation, we will find that K, N and O are not balanced.

    Therefore, this equation is not balanced.
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