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ChemistryChemistry
15 September, 09:08

Which of these equations is balanced? a. H2SO4 + 2Al → Al2 (SO4) 3 + H2 b. 2KCl + Pb (NO3) 2 → 2KNO3 + PbCl2

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Answers (2)
  1. 15 September, 09:45
    0
    A is not, left side has too little SO4

    v is correct, it is balanced, just make sure the elements of each side are the same
  2. 15 September, 10:05
    0
    The answer is B, you just check if it is the same on the left and right side

    A:

    Left side - Right side

    2xH - 2xH

    1xS - 3xS

    4xO - 12xO

    2xAl - 2xAl

    Therefore A is not correct

    B:

    Left side - right side

    2xK - 2xK

    1xCl - 1xCl

    1xPb - 1xPb

    2xN - 2xN

    6xO - 6xO

    B is therefore correct as both sides add up
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