15 Facts on HI + NaHCO3: What, How To Balance & FAQs

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Chemical reactions are orientation based interactions between the reactants to form new compounds with different compositions. Let us discuss the reactivity of HI and NaHCO3.

The high acidity of HI makes it easily dissociated in water to release the proton freely. NaHCO3 is widely available as baking soda which readily reacts with acids to release carbon dioxide as brisk effervescence. Sodium bicarbonate can also reduce oxidative stress.

The reactivity of HI and NaHCO3 can be helpful for the production of radioactive scintillators, detectors, and radiations. Furthermore, some important reaction mechanisms of the reactant species are studied as under:

What is the product of HI and NaHCO3?

HI and NaHCO3 react together to form sodium iodide, carbon dioxide gas, and water. The complete chemical equation is given as:

HI + NaHCO3 = NaI + H2O + CO2

What type of reaction is HI + NaHCO3?

HI + NaHCO3 is an acid base neutralization reaction where hydrogen iodide as an acid reacts with sodium bicarbonate as the base to form sodium iodide, salt, and water liberating carbon dioxide as gas.

How to balance HI + NaHCO3?

The following algebraic methodology can be used as an explanation to balance the chemical reaction

HI + NaHCO3 = NaI + H2O + CO2,

  • Label each species (reactant or product) given in the chemical equation with a respective variable (A, B, C, D, and E) to illustrate unknown coefficients.
  • A HI + B NaHCO3 = C NaI + D H2O + E CO2
  • Deduce a suitable equation for each element in the reacting species representing the number of atoms of an element in each reactant or product species, applied to solve the equation.
  • H = A + B = 2D, I = A = C, Na = B = C, C = B = E, O = 3B = D + 2E
  • The Gaussian elimination and substitution methodology is applied to simplify all the variables and coefficients, and the outcomes are
  • A = 1, B = 1, C = 1, D = 1, and E = 1
  • Hence, the overall balanced equation is,
  • HI + NaHCO3 = NaI + H2O + CO2

HI + NaHCO3 titration

HI + NaHCO3 system is performed as acid base titration to determine the strength of NaHCO3 in the given solution. The following steps are followed to proceed with the titration:

Apparatus Used

Burette, holder, stands, conical flask, volumetric flask, beakers, measuring cylinder

Indicator

Methyl orange is used as the indicator for HI + NaHCO3 titration system

Procedure

  • The burette is filled with standard NaHCO3 solution
  • The initial reading on the burette is noted.
  • Pipette out 10 mL of HI solution in a conical flask.
  • Add few drops of methyl orange indicator to the conical flask.
  • On addition of sodium bicarbonate solution from the burette to the conical flask dropwise the colour change is observed.
  • Note till the color changes start changing to light pink.
  • Note the final reading of the burette
  • Calculate the volume of sodium bicarbonate solution used to neutralize the HI solution.
  • Repeat the titration process for at least three concordant readings.
  • Unknown concentration of NaHCO3 is calculated using the formula M1 * V1 = M2 * V2
  • Where M1 = Molarity of HI solution, V1 = Volume of HI solution, M2 = Molarity of NaHCO3 solution, V2 = Volume of NaHCO3 solution

HI + NaHCO3 net ionic equation

The net ionic equation of HI + NaHCO3 is,

HCO3– (aq) + H+ (aq) = NaI(s) + CO2 (g) + H2O (l)

  • Write the balanced chemical equation and designate the physical states of reactants and products accordingly
  • HI (l) + NaHCO3 (s) = NaI (s) + H2O (l) + CO2 (g)
  • Now, strong acids, bases, and salts dissociate into ions whereas pure solid substances and molecules do not dissociate
  • Thus, the net ionic equation is
  • HCO3– (aq) + H+ (aq) = NaI(s) + CO2 (g) + H2O (l)

HI + NaHCO3 conjugate pairs

HI and NaHCO3 reaction has the following conjugate pairs,

  • Conjugate pair of strong acid HI is I–.
  • Conjugate pair of base NaHCO3 is HCO3–

HI + NaHCO3 intermolecular forces

Intermolecular forces acting on HI and NaHCO3 are:

  • HI interacts via weak London dispersion forces and dipole-dipole interactions among the molecules.
  • NaHCO3 forms ion-dipole intermolecular interactions between Na+ and HCO3– ions.

HI + NaHCO3 reaction enthalpy

HI + NaHCO3 exhibits a positive reaction enthalpy of +3.30 kJ/mol. Enthalpy information for the reactants and products involved are as follows:

  • Enthalpy of formation for reactant HI: +42.67 kJ/mol
  • Enthalpy of formation for reactant NaHCO3: -1013 kJ/mol
  • Enthalpy of formation for product NaI: -288 kJ/mol
  • Enthalpy of formation for product H2O: -285.8 kJ/mol
  • Enthalpy of formation for product CO2: -393.5 kJ/mol

Is HI + NaHCO3 a buffer solution?

HI +NaHCO3 is not a buffer solution because of the fact that NaHCO3 easily dissociates into ions and thus cannot maintain the pH constant which is a necessary condition for buffer formation.

Is HI + NaHCO3 a complete reaction?

HI + NaHCO3 is a complete reaction because NaI, H2O and CO2 are the stable products formed in the reaction.   

Is HI + NaHCO3 an exothermic or endothermic reaction?

HI + NaHCO3 is an endothermic reaction because the calculated reaction enthalpy was positive, which means the heat would have been released in the reaction.

Is HI + NaHCO3 a redox reaction?

HI + NaHCO3 is not a redox reaction because there is no oxidation state change observed in the reaction. Hydrogen and sodium maintain +1 oxidation state in both the reactant and product side of the reaction.

Is HI + NaHCO3 a precipitation reaction?

HI + NaHCO3 is not a precipitation reaction as NaI produced in the reaction is highly soluble in water therefore no solid precipitate remains at the end of the reaction.

Is HI + NaHCO3 reversible or irreversible reaction?

HI + NaHCO3 is an irreversible reaction as the products formed are not reversed back to the original reactants in the reaction until the conditions are kept unchanged.

Is HI + NaHCO3 displacement reaction?

HI + NaHCO3 is a double displacement reaction because the sodium cation replaces the hydrogen cation to from new compounds.

Conclusions

The chemical reactivity of HI + NaHCO3 forms NaI which is an ionic water soluble compound. NaI has a unique property to disrupt the hydrogen bonding between the water molecules helping in the absorption and digestion properties of the human system.