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11 June, 06:03

An incomplete chemical equation is given here. Which set of numbers, placed in the blanks as the coefficients, will balance the equation shown? __HCl + __Na2CO3 → __H2CO3 + __NaCl 1, 2, 1, 2 2, 1, 2, 1 2, 1, 1, 2 2, 2, 1, 1

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Answers (2)
  1. 11 June, 08:08
    0
    The coefficients are: 2,1,1,2 (Option 3)

    Explanation:

    Step 1: Unbalanced equation

    HCl + Na2CO3 → H2CO3 + NaCl

    Step 2 : Balancing the equation

    On the right side we have 2x H (in H2CO3), on the left side we have 1x H (in HCl). To balance the amount of H, we have to multiply HCl, on the left side, by 2.

    2 HCl + Na2CO3 → H2CO3 + NaCl

    On the left side we have 2x Na (in Na2CO3), on the right side, we have 1x Na (in NaCl). To balance the amount of Na, we have to multiply NaCl, on the right side, by 2. Now the equation is balanced.

    2 HCl + Na2CO3 → H2CO3 + 2NaCl

    The coefficients are: 2,1,1,2 (Option 3)
  2. 11 June, 10:02
    0
    The answer to your question is the coefficients are 2, 1, 1, 2

    Explanation:

    Chemical Reaction

    HCl + Na₂CO₃ ⇒ H₂CO₃ + NaCl

    Reactants Elements Products

    1 Cl 1

    2 Na 1

    1 C 1

    1 H 2

    3 O 3

    This reaction is unbalanced

    2 HCl + Na₂CO₃ ⇒ H₂CO₃ + 2 NaCl

    Reactants Elements Products

    1 Cl 1

    2 Na 2

    2 C 2

    2 H 2

    3 O 3

    Now, the reaction is balanced.
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