Nickel carbonate (Nickel(II) carbonate) and Hydrochloric acid Reaction | NiCO3 + HCl

Nickel carbonate (NiCO3) reacts with hydrochloric acid (HCl) and form Nickel chloride (NiCl2) and water (H2O). NiCO3 is a green colour precipitate and HCl is an aqueous solution. When reaction occurs, green colour precipitate is dissolved and a green colour aqueous solution is given.

In this tutorial, we will discuss followings.

Reaction of NiCO3 and HCl and balanced equation

  • As mentioned earlier, Nickel chloride and water are given as products. Because Nickel carbonate's solubility is low in water, NiCO3 partially dissociates to Ni2+ and CO32- ions in water. Therefore there is very low CO32- concentration in the aqueous solution which contains NiCO3.
  • But, HCl is readily soluble in water dissociates to H+ ions and Cl- ions and form a colourless solution.
nickel carbonate hydrochloric acid NiCO3 + HCl reaction

Balanced equation of NiCO3 and HCl

NiCO3(s) + 2HCl(aq) → NiCl2(aq) + CO2(g) + 2H2O(l)

According to the balanced equation, one mole of NiCO3 reacts with two mole of HCl and gives one mole of NiCl2 one mole of CO2 and one mole of H2O respectively.

balanced equation of nickel carbonate hydrochloric acid NiCO3 + HCl reaction

Reactants of the reaction: NiCO3 and HCl

Nickel carbonate / Nickel(II) carbonate / NiCO3

Nickel carbonate is a green colour solid at room temperature and poorly soluble in water. When NiCO3 solid is added to water, it deposits as a green precipitate at the bottom of the solution.

Hydrochloric acid (HCl)

Hydrochloric acid is a strong acid and highly soluble in water. It dissociates completely to H+ and Cl- ions in water.

Products of the reaction: NiCl2 and H2O

Nickel chloride / Nickel(II) chloride / NiCl2

Nickel chloride is a greenish white crystalline solid and soluble in water to form green aqueous solution.

Change of oxidation numbers

Oxidation numbers of atoms are not changed during the reaction. Therefore, this reaction is not a redox reaction.

Physical and chemical observation of CaCO3 and HCl reaction

Here, we will see some physical observations and chemical properties changes during the reaction.

Colour and physical state changes

  • Because NiCO3's solubility is low is water, you can see a deposited green solid at the bottom of the solution. HCl is a colourless solution.
  • NiCl2 is soluble in water and give a green colour aqueous solution.

Safety, health hazards and environmental impacts due to CaCO3, HCl and CaCl2

  • NiCO3: Harmful if swallowed, skin irritation, allergic skin reaction, Toxic if inhaled
  • HCl: Corrosive, Acute toxic
  • NiCl2: Harmful if swallowed, skin irritation, allergic skin reaction, Toxic if inhaled


Nickel carbonate + Hydrochloric acid word equation

Nickel carbonate + Hydrochloric acid → Nickel chloride + Carbon dioxide + Water

Please write Nickel carbonate and Hydrochloric acid balanced equation

NiCO3(s) + 2HCl(aq) → NiCl2(aq) + CO2(g) + 2H2O(l)

What is the Nickel carbonate colour

Nickel carbonate is light green crystals.

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