15 Facts on HCl + Na2SiO3: What, How to Balance & FAQs

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HCl + Na2SiO3 is a representation of chemical reaction happens between HCl and Na2SiO3. The facts about the compound are shortly described below.

HCl (Hydrochloric acid) is a strong acid which actively reacts with any base. Na2SiO3 (Sodium metasilicate/Sodium silicate) is called water glass. The compound is a water soluble solid with transparent glass like structure. Na2SiO3 has been found to actively react with Hydrogen ions to make silicic acids.

The reaction between HCl and Na2SiO3 will be described throughout this article. The article will demonstrate several; internal facts and process of this reaction with chemical evidences below:

What is the product of HCl and Na2SiO3?

HCl + Na2SiO3 reaction produces Sodium chloride (NaCl), Silica (SiO2) and water (H2O).

What type of reaction is HCl + Na2SiO3?

HCl + Na2SiO3 reaction is considered as an acid-base reaction and a combination reaction. Since the products can be found as the combination of the elements of reaction with new pattern, this is considered as a combination reaction.

How to balance HCl + Na2SiO3?

HCl + Na2SiO3 reaction and balancing process of its equation are given below with a few steps:

  • Identification of the number of element in each side of the reaction.
    1. The general equation of the reaction is Na2SiO3 + HCl → NaCl + SiO2 + H2O
    2. The number of atoms present in the reactants are 2 Na, 1 Si, 3 O, 1 H and 1 Cl
    3. The number of atoms present in the products are 1 Na, 1 Cl, 2H, 2O and 1 Si
  • Recognition of the atoms, which need to be balanced
    1. The number of H and Na only need to be balanced here.
    2. Now the new equation is predicted as Na2SiO3 + HCl → 2NaCl + SiO2 + H2O
    3. Multiplication of NaCl with 2 is not enough in balancing the number of Cl in each side.
  • Final attempt in balancing rest of the equation,
    Now the equation has been obtained as Na2SiO3 + 2HCl → 2NaCl + SiO2 + H2O
  • Finally the balanced equation is found as,
    Na2SiO3 + 2HCl → 2NaCl + SiO2 + H2O

HCl + Na2SiO3 titration

HCl + Na2SiO3 titration takes place when 1 ml of Na2SiO3 is added with 99 ml of water. A detailed process of titration is given below for neutralising alkaline solution of Na2SiO3.

Used apparatus

The apparatus used in titration are Conical flask, Pipette, Burette, Volumetric mask, Beaker, Burette holder stand

Titre and titrant

In HCl + Na2SiO3 titration, Na2SiO3 is the titre and HCl is titrant.

Indicator

1 drop of Phenolphthalein is used as the indicator of this titration.

Procedure

0.5N HCl is taken out from a jar with the help of pipette and it is put into the burette. 100 ml of Sodium silicate and water solution is kept ready to be titrated. Drop wise, HCl is added into the solution by using 1 drop of Phenolphthalein indicator and the titration is completed.

Using v1s1 = v2s2 formula, future calculation is done to identify the amount of titre and titrant. 

HCl + Na2SiO3 net ionic equation

HCl + Na2SiO3 net ionic equation is as follows:

Na2SiO3 (S) + 2HCl (Liq) → 2NaCl (S) + SiO2(S) + H2O (Liq)

HCl + Na2SiO3 conjugate pairs

HCl + Na2SiO3 conjugate pairs are obtained as:

  • As Na2SiO3 is an extremely weak base it is considered as conjugate base of HCl.
  • HCl is conjugate acid of Na2SiO3
  • H+ and Cl– are conjugate acid-base pair

HCl and Na2SiO3 intermolecular forces

HCl and Na2SiO3 intermolecular forces are as follows:

  • Intermolecular force between H and Cl are very strong as it represents dipole-dipole force
  • Intermolecular force between Na, Si and O are also considered string due to ionic force

HCl + Na2SiO3 reaction enthalpy

HCl + Na2SiO3 reaction enthalpy is -795.6kJ.

Is HCl + Na2SiO3 a buffer solution?

HCl + Na2SiO3 is not a buffer solution as HCl is not weak acid rather it is very strong acid and incapable of making buffer with weak bases.

Is HCl + Na2SiO3 a complete reaction?

HCl + Na2SiO3 is a complete reaction which is displayed as,

Na2SiO3 + HCl → NaCl + SiO2 + H2O

Is HCl + Na2SiO3 an exothermic or endothermic reaction?

HCl + Na2SiO3 is an exothermic reaction as its enthalpy has been found with negative value and a certain amount of heat and energy is released by the reaction with products.

Is HCl + Na2SiO3 a redox reaction?

HCl + Na2SiO3 is a redox reaction. The oxidation states of element in reactants and products are noticed to be different.

Is HCl + Na2SiO3 a precipitation reaction?

HCl + Na2SiO3 is not a precipitation reaction. None of the products in this reaction is found to make precipitate in the solution.

Is HCl + Na2SiO3 reversible or irreversible reaction?

HCl + Na2SiO3 is an irreversible reaction as the products, SiO2, H2O and NaCl are not capable of making the reactants again by combining with each other.

Is HCl + Na2SiO3 displacement reaction?

HCl + Na2SiO3 is a double displacement reaction as Chlorine of HCl gets addition with Na of Na2SiO3 and makes NaCl. Besides, SiO3 of Na2SiO3 gets attached with the H+ ion left by Chlorine.

Displacement is taking place two times here so the reaction is considered as double displacement reaction.

How to balance Na2SiO3 + HCl + H2O = H4SiO4 + NaCl?

A systematic process of balancing the equation is given below:

  • Calculation of element in each side of general equation,
    1. The general equation is Na2SiO3 + HCl + H2O = H4SiO4 + NaCl
    2. In reactants there are 2 Na, 1 Si, 1Cl, 4 O, 3 H elements present
    3. In products there are 4 H, 4 O, 1 Si, 1 Na, 1 Cl elements present
  • Identifying the elements needed to be balanced,
    The number of Na and H must be balanced in each side.
  • Multiplication of HCl with 2
    1. The equation comes out as Na2SiO3 + 2HCl + H2O = H4SiO4 + NaCl
    2. Now the number of Cl became misbalanced and Na is still needed to be adjusted in each side
  • Final attempt by multiplying NaCl with 2,
    Now the equation is found to be Na2SiO3 + 2HCl + H2O = H4SiO4 + 2NaCl
  • Final representation of the balanced equation,
    The balanced equation has been obtained as Na2SiO3 + 2HCl + H2O = H4SiO4 + 2NaCl

Conclusion

HCl + Na2SiO3 reaction has ben identified as one of the influential reaction which denotes combination, acid-base and double displacement reactions. The reaction between strong acid and weak base reliably reflects the use of Phenolphthalein as indicator in the titration as well.