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What is the oxidation state of the underlined atom in the reaction: NaHCO3 + HCl = NaCl + CO2 + H2O
underlined is the Na in NaHCO3

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Dsdrajlinid

Answer:

+1

Explanation:

Let's consider the following equation.

NaHCO₃ + HCl ⇒ NaCl + CO₂ + H₂O

To determine the oxidation number of Na in NaHCO₃ we will use the following rule: the sum of the oxidation number of the elements present in a compound is equal to this charge. For this compound we know:

  • The oxidation number of H is +1.
  • The oxidation number of C is +4.
  • The oxidation number of O is -2.
  • The charge of the compound is zero (neutral compound)

Na + H + C + 3 O = 0

Na + (+1) + (+4) + 3 (-2) = 0

Na = +1

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