Calcium hydroxide has a basic property và can easily react with a strong acid lượt thích hydrochloric acid. Let us see the chemical behaviour of the reaction between HCl và CaOCl2.

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An aqueous solution of hydrogen chloride is hydrochloric acid (HCl), often called muriatic acid. Hydrochloric acid is highly soluble in water. Calcium hydroxide (Ca(OH)2) is a trắng solid at room temperature that is only slightly soluble in water. When Ca(OH)2 và HCl react, a weak base-strong acid reaction occurs.In this article, we shall discuss some of the properties of this reaction, lượt thích its product, type of reaction, enthalpy, và intermolecular forces, in detail.

What is the sản phẩm of HCL & CA(OH)2 ?

When calcium hydroxide Ca(OH)2 & hydrochloric acid (HCl) combine, calcium chloride (CaCl2) và water are produced (H2O), when the reaction occurs, a colourless solution is produced after the trắng precipitate has dissolved.Ca(OH)2 (s)+ 2HCl (aq) → CaCl2 (aq) + 2H2O (l)

What type of reaction is HCL + CA(OH)2 ?

The reaction between hydrochloric acid (HCl) & calcium hydroxide Ca(OH)2 is an acid-base reaction. It can also be categorised as a neutralisation reaction since acid & alkali have reacted from salt & water. 

How lớn balance HCL + CA(OH)2 ?

Step 1: Writing the general equation

The general equation is Ca(OH)2 (s)+ HCl (aq) → CaCl2 (aq) + H2O (l) 

Step 2: Arranging the similarity between the reactant & product

In the reaction, the number of moles of reactant must be equal lớn the number of moles of the product and the reaction have balanced moles.Since the product has 2 moles of Cl atom. 2 moles of HCl are added. On the reactant side, there are 2 moles of oxygen. Thus, 2 moles of H2O are added on the hàng hóa side.

Step 3: Writing the balanced equation

After adding the required number of moles on the reactant & product side, the overall balanced reaction is given by:

Ca(OH)2 (s)+ 2HCl (aq) → CaCl2 (aq) + H2O (l)

HCL + CA(OH)2 titration

An acid-base titration between calcium hydroxide & hydrochloric acid can be performed to lớn measure the amount of calcium. Various conditions & apparatus are used, which are explained below.

Apparatus used

Burette, pipette, conical flask, burette holder, wash bottle, dropper, volumetric flask và beakers.

Titer & titrant

Hydrochloric acid is used as the titrant and filled in the burette. The chemical compound will be analysed with calcium hydroxide as the titer was taken in a conical flask.


Phenolphthalein is an acid-base indicator used to detect the end point of the titration.


Standardised HCl was taken in a burette, và the given calcium hydroxide was taken in a conical flask.Added 1-2 drops of phenolphthalein indicator.Added HCl from the burette slowly into the conical flask with constant swirling until the solution turned from colourless khổng lồ light pink.

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Repeated the procedure lớn get 3 concordant readings.

HCL + CA(OH)2 net ionic equation

Since the reaction between calcium hydroxide Ca(OH)2 và hydrochloric acid (HCl) is a neutralisation reaction, the net ionic reaction follows a neutralisation reaction which is as follows:H+ (aq) + OH– (aq) → H2O (l)

HCL + CA(OH)2 conjugate pairs

The conjugate pair of the reaction between hydrochloric acid & calcium hydroxide is as follows:

HCl + OH– → Cl– + H2O(Acid) (Base) (Base) (Acid) In this reaction, HCl & Cl – are conjugate acid-base pairs và OH– & H2O are another conjugate acid-base pair.

HCL & CA(OH)2 intermolecular forces

In HCl, dipole-dipole interactions và London dispersion intermolecular forces are the intermolecular forces that hold the hydrogen và chloride ions together.Ca(OH)2 is an ionic compound with strong electrostatic attraction forces between Ca2+ and OH– ions.

HCL + CA(OH)2 reaction enthalpy

The standard reaction enthalpy of the reaction between hydrochloric acid and calcium hydroxide is negative.

Is HCL + CA(OH)2 a buffer solution ?

HCl + Ca(OH)2 pairs of solutes would not khung a strong buffer solution since HCl is a strong acid, not a weak acid. The acid should be weak, so adding more acid does not significantly change the pH.

Is HCL + CA(OH)2 a complete reaction ?

The above reaction is incomplete since there is no sản phẩm formation. We can only determine whether or not the reaction will be complete once we observe any hàng hóa on the right-hand side.

Is HCL + CA(OH)2 an exothermic or endothermic reaction ?

The reaction between hydrochloric acid & calcium hydroxide is exothermic. Therefore, this heat will be a driving force to lớn complete the reaction.

Is HCL + CA(OH)2 a redox reaction ?

HCl + Ca(OH)2  is not a redox reaction since there is no change in the oxidation state of reactants & products.

Is HCL + CA(OH)2 a precipitation reaction ?

HCl + Ca(OH)2  is not a precipitation reaction. HCl is an aqueous solution, whereas Ca(OH)2 is a trắng precipitate. When a reaction occurs, a colourless solution is produced after the white precipitate has dissolved.

Is HCL + CA(OH)2 reversible or irreversible reaction ?

The reaction between calcium hydroxide Ca(OH)2 & hydrochloric acid (HCl) is irreversible because the products formed don’t react together to reform reactants.

Is HCL + CA(OH)2 displacement reaction ?

The above reaction is a double displacement reaction because the cations and anions swap lớn create the water & the salt.

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ConclusionThis article summarises the reaction of HCl + Ca(OH)2 as a type of acid-base neutralisation reaction.