15 Facts on H2SO4 + NaI: What, How To Balance & FAQs

H2SO4 is categorized as a strong acid. Let us discuss what will happen when H2SO4 reacts with NaI.

H2SO4, also known as sulphuric acid, has a molecular mass of 98 g/mol and is a colorless, odorless liquid that is miscible with water. Sodium iodide is formed by the reaction of sodium metal and iodine. These two components react to generate fumes of hydrogen iodide and the color of the resultant solution is red.

Let us discuss the product formed when H2SO4 reacts with NaI, the type of reaction, the net ionic equation and many other related topics in this article.

What is the product of H2SO4 and NaI ?

Sulphuric acid reacts with sodium iodide to give sodium sulphate, hydrogen sulphide, iodine and water.

H2SO4 + NaI = Na2SO4 + H2S + I2 + H2O

What type of reaction is H2SO4 + NaI ?

H2SO4 + NaI is an acid-base reaction because salt and water are produced when strong acid and weak base interact with each other.

How to balance H2SO4 + NaI ?

The following steps need to be followed while balancing a chemical equation.

  • Given below is an unbalanced chemical reaction of H2SO4 and Li2O,
    H2SO4 + NaI = Na2SO4 + H2S + I2 + H2O
  • Record the moles of each element on the reactant and product sides.
Element Reactant Product
H 2 4
S 1 2
O 4 5
Na 1 2
I 1 2
Moles of element in reactant and product side
  • Now, the number of moles present on each side of the reactant and product must be equal in order to balance the chemical equation. In this case, the number of moles of each element is varied.
  • A chemical equation must be balanced by performing the following actions.
    H2SO4 in the reactant side should be multiplied by 5.
    NaI in the reactant side should be multiplied by 8.
    Na2SO4 in the product side should be multiplied by 4.
    I2 in the product side should be multiplied by 4.
    H2O in the product side should be multiplied by 4.
  • Finally, the balanced chemical equation is,

5H2SO4 + 8NaI = 4Na2SO4 + H2S(g) + 4I2 + 4H2O

H2SO4 + NaI titration

The titration of H2SO4 and NaI will yield noticeable results.

Apparatus

We need a burette, conical flask, burette holder, volumetric flask, and beakers for this titration.

Indicator

The phenolphthalein or methyl orange indicator can be used because it is a strong acid versus weak base reaction, and its endpoint is pink to colorless.

Procedure

The burette was filled with standardized H2SO4 and NaI was taken in a conical flask along with the respective indicator. H2SO4 is added dropwise to the conical flask and the flask was shaking constantly. After a certain time when the endpoint arrived, indicator changes its color and the reaction was done.

We repeat the titration several times for better results and then we estimate sodium sulfate quantity by the formula V1S= V2S2.

H2SO4 + NaI net ionic equation

The net ionic equation for the reaction of H2SO4 + NaI will be :

2H+ + SO42- + = Na+ + SO42- + 4H+ + O2- + S2- + I

H2SO4 + NaI conjugate pairs

The conjugate acid-base pairs of the reaction H2SO4 + NaI are:

  • H2SO4 (Conjugate base) = HSO4
  • H2O (Conjugate base) = OH

H2SO4 and NaI intermolecular forces

The intermolecular force present in H2SO4 is due to the strong electrostatic force between a proton and sulfate ions. H2SO4 shows ionic character in an aqueous medium and acts as a good dehydrating agent.

Is H2SO4 + NaI a buffer solution ?

H2SO4 + NaI is not a buffer solution due to the presence of the strong acid H2SO4.

Is H2SO4 + NaI a complete reaction ?

The reaction between H2SO4 and NaI is complete. Since all of the reactant’s moles are completely converted and consumed by the product at equilibrium.

Is H2SO4 + NaI an exothermic or endothermic reaction ?

The reaction between H2SO4 and NaI is exothermic as the energy generated during the reaction is sufficient to carry out the entire reaction. There is no requirement for extra energy.

Is H2SO4 + NaI a redox reaction ?

H2SO4 + NaI is not a redox reaction because there is no change in the oxidation state of any element either in the reactant or product side.

Is H2SO4 + NaI a precipitation reaction ?

The reaction H2SO4 + NaI is a precipitation reaction because Na2SO4 gets precipitated in the solution and is not soluble in the reaction mixture.

Is H2SO4 + NaI reversible or irreversible reaction ?

H2SO4 + NaI reaction is a reversible reaction as the products reached an equilibrium in certain conditions.

Is H2SO4 + NaI displacement reaction ?

H2SO4 and NaI is a double displacement reaction because the sulfate ion is transferred from H2SO4 to Na2SO4 and the Hydrogen ion is transferred from H2SO4 to H2O.

Conclusion

The reaction’s byproduct, sodium sulphate, is used to dry organic liquids. Anhydrous sulfate is best described as a white, crystalline solid. It is used as a filler in powder form in household laundry detergent.